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 ierus,  o f  the  coast  o f Franc e  and  Belgium  (see  Ann. &  
 Mag. N. H .  1846),  believing th a t the difference in  the  size  
 o f the  teeth,  (which Mr. James Sowerby remarks  appear to  
 indicate) to bo only a peculiarity  produced probably  by  the  
 age  o f the  specimen,  instead  o f being,  as it   has  proved  to  
 be,  a   distinctive  character o f the  genus. 
 1 have ventured, in  reducing M.  De Blainville’s  tracing,  
 to  reverse  the  position  o f the  skull,  as  the  p a rt now  uppermost, 
   appeai-s  to me  evidently  to b e   the  top  of th e  head. 
 T h e   S e c h e l l e   Z i p h iu s .  Ziphius Sechellensis. 
 Tab .  6   F i g . / - 2 . . 
 Ziphius de  Sechelles  {M.  L eD u c ,  1839), Mus. Paris. 
 The  skull  is  very  like  th a t  o f Delp h in u s  micropterus,  
 b u t the  nose-bones  are  thicker,  heavier  and  higher.  T h e   
 teeth  in  the  middle  o f  th e   lower  jaw ,  as  in micropterus,  
 b u t larger  and compressed.  T h e   hinder  p art  of the  lower  
 jaw   is  very  broad,  the  front h a lf  much  narrower  and  b en t  
 down  in  an  arched manner. 
 Iiihab. Sechelles. 
 E x ac tly   like  the  fossil  form, D'Anvers. 
 same  as Dale’s Hyperoodon,  and  F.  Cuvier followed him :  
 b u t  M.  Cuvier p ointed  out,  in  the  ‘ Règne  Animal,’  the  
 difference  in  th e  form  of  the  skull  o f  the  F rench  animal. 
 B l a in v il l e ’s  W h a l e .  Delphinorhynchus micropterus.  
 Delphinorhynchus m icropterus, Dumortier, Mem.  Acad.  
 Bru.x.  xii.  t.  1—3,  good.  F. Cuv.  Cetac.  114,  t.  9 , / .   1, not  
 good,  t.  7,  skull. 
 Delphinus micropterus, Cuv.  Reg. A n .  i.  288. 
 He terodon  Dalei, Lesson, Mam. Mem.  419,  from B la in .  
 Da u p h in   dc Dale,  Bla in v . N . B u ll. Soc. P /u 7 .1185.  829, 
 F.  Cuv. Mam . L ith .  t.  bad. 
 Tee th  none ;  body  deep  ash,  bene ath white  (when  alive  
 brownish  asli-colour,  belly whitish  ash);  forehead  tape rin 
 g ;  dorsal  fin  f ,   pectoral  fm f ,   from end  o f nose;  blowers  
 before  the  eyes. 
 In h ab .  Coasts  of  Europe .  Havre,  1825,  B la in v   
 tend,  1885, Dum. 
 D e l p h in o r h y n c h u s ,  Bla in v .  p a rt,  F.  Cuv.  Delphinus,  
 Desm.  Aodon,  Lesson.  Heterodon,  Lesson,  Mam . 
 H e ad   attenuated,  contracted  behind.  Nose  produced,  
 ba ld ,  not  separated  from  th e   forehead.  E y e s   moderate.  
 Lower  jaw   fitting into  a   groove  in  the  edge  o f  the  upper.  
 Tee th  few,  small  or rudimentary,  in  middle  o f  lower  jaw,  
 n o t  developed  till  late.  Th ro a t  with  4  parallel  slits  
 beneath.  Body  elongate, ra the r  swollen  behind.  Pectoral  
 fill  low down  th e  side,  oval, narrow,  small.  Dorsal  falcate,  
 behind  the  middle  o f  th e   body,  about  f   from  the  nose.  
 Blowers  on  the  crown,  curved, with  the  concavity  in  front.  
 T a il with  2  falcate lobes,  flat,  without  any  central  prominence. 
   Sexual  organs  under middle  o f  dorsal.  Skull  triangular. 
   Forehead  very  high  in  front and  swollen behind,  
 lutermaxillarie s  curved  in  front.  Nose  very long,  compressed  
 a t  the  hinder  end,  very  narrow,  slightly  keeled on  
 each  side.  H in d e r  wing  o f  th e   maxiila expanded  horizontally  
 over the  orbits.  Nasal  boneeucased  in  th e   frontal  
 and intermaxillaries.  Temporal  p it  very small.  P alate  
 smooth.  Lower  jaw-bones  elongate,  tapering,  slender,  
 nearly  straight. 
 Th is   genus,  which is  in  cha rac ter  intermediate between  
 P la ta n is ta   and  Delphinus, has been confounded with H y peroodon  
 by M.  F .  Cuvier,  b u t it is  easily  known from  that  
 genus,  as was pointed out by his  brother,  by  th e  structure  
 o f the  skull, which  agrees with  Delphinus.  The  ear-bone  
 is  attached  by  an  apophysis to  the  base  o f th e  skull.  Vertebræ  
 38;  6 cervical  separate,  10  co.stal,  11  lumbar,  11  true  
 caudal.  Metacarpal  bones  cartilaginous. —  Dumortier,  
 Mem.  B r u x . xiii.  t.  10. 
 T h is  genus  has  been  confounded  ivith  Hyperoodon  by  
 many o f  the  F ren c h   authors,  b u t  it  is  easily  known  from  
 th a t genus  by   th e  head  not being rounded  in  front,  an d  by  
 the  tee th  being  in  the middle  of the  side  of each jaw.  ' 
 Mr. Bell,  following Lesson, has  considered  th is as  a  distin 
 c t genus from Hyperoodon ;  b u t  h e   observes,  “  whether  
 th e  generic distinc tion  o f th e   two be  correct,  appears very  
 doubtful.” — B r it. M am .  499.  Blainville,  when  he  first  
 saw  the  animal  on  th e   coast  o f  France,  considered  it  the 
 Length,  e n t i r e , ......... 
 „   o f head, 
 „  to blowers, 
 „  to  pectoral, 
 „   of pectoral, 
 to  dorsal,  
 of dorsal. 
 to  eye,  ....  
 3  the  vvuu‘lva,....  
 Circumference,  ....  
 Width  of pectoral, 
 „  of caudal,  
 H e ig h t  of dorsal.  
 Breadth  o f blower, 
 Blainv.  2 Dum.  2 
 15-0  ft. 3-45 mt 
 2.7 (nose)  33 
 2-3 44 
 ,  3-4 91 
 .  1-6 30 
 .  9-1 2-04 
 10 27 
 .............  49 
 .............  2.21 
 .  7-6 2-0 
 6 12 
 .  3-0 68 
 11 27 
 .............  10 
 M. Dumortier  found,  near  the  middle  o f  each  side  of  
 the  lower jaw,  a  large  alveolus,  as if  for  a  tooth.  H is   figure  
 represents the  pectoral  as 4,  and  the  dorsal as 4  from  
 th e   end  o f the  nose. 
 b.  Upper a n d   lower ja w  w ith  f e w   or  deciduous  teeth.  
 Wings  o f   the  m a x illa ry   hones  expanded  an d   shelving  
 downwards.  The  beak  short,  defiexed.  Forehead conve 
 x .  He a d  rounded,  w ith o u t a n y   beak.  Monoceratina. 
 Synopsis o f  the  Genera. 
 a.  Lower ja w   toothless. 
 1.  M o n o d o n .  Uppe r jaw  of males with one or two very  
 long,  projecting,  spirally  twisted  tusks.  Dorsal none. 
 “  2.  A n a r n a c h u s .  U ppe r  jaw with  two  small,  conical,  
 slightly  curved, b lu n t tee th  in  front,  dorsal  none.” 
 b.  Upper a n d  lower ja w   w ith   conical,  early  deciduous  
 teeth. 
 S.  B e l u g a .  Dorsal fin  none. 
 c.  Upper  a nd  lower  ja w   w ith   compressed,  perm anent  
 teeth. 
 4.  N e o m e r is .  Dorsal  none. 
 5.  PH0C.i:NA.  Dorsal  triangular,  in  the  middle  o f  the  
 back. 
 *  Teeth  none.  Upper ja w  w ith   tusk. 
 M o n o d o n ,  Fab., L in n ., no t Sw a in .  Ceratodon, Brisson,  
 Pallas.  Diodon,  Storr., not  L in n .  Narwalus,  Lacep. 
 H e ad   round  and  convex  in  fro n t;  dorsal  fin  none;  lower  
 jaw  not  so wide  as the  upper. 
 T h e  N a r w h a l .  Monodon monoceros. 
 Monodon Monoceros  and M.  unicornu, L in n . 
 M.  Narwhal, B lumb. 
 Narwhalus  Aiidersonii  and  N.  microcephalus,  Lacep.  
 Scoresby,  Arct.  Reg.  i.  486 — ii.  t.  12,  f.  1,  2.  Fleming,  
 Wern.  Trans,  i.  131.  Cuv.  Oss.  Foss.  v.  t.  22,  f .   7.  
 Home,  Anat.  Comp.  ii.  t.  42.  Albei-s,  Icon.  t.  Alton,  
 Osteol.  ix.  t.  6. 
 Nai-wal,  Camper,  Cetac.  t.  29,  30.  KUen,  Pise. t. 2, f . 
 c.  fr om   spec,  at Dresden,  taken  in   the Elbe,  1736,  cop.  
 la c e p .  t.  4 , f   3. 
 Black ;  when  old whitish marbled. 
 In h ab . No rth  Ocean,  Scotland. 
 Rig h t  tusk  generally n o t  developed.  Female  generally  
 without  tusk,  b u t  sometimes  has  o n e ;  see  L in n .  Trans. 
 xiii.  620. 
 1.  Narwalus microcepalus,  Lacep.  t.  5, f .   2,  from  drawing  
 of M r. W.  B rand,  is  only  a bad  representation  o f  this  
 species. 
 2.  Narwalus  Andersonianus,  Lacep.  Cetac.  163,  from  
 Anderson,  described  from  same  specimen,  as  figured by  
 Lacep.  t.  4 , / .   2. 
 Skull,  lengih  entire 21-6 
 2 
 20-6 
 „   o f nose 9 9 9-3 
 W id th   o f orbit 14'6 14-0 
 „   o f notch 8-0 7-9 
 „  intermaxillaries 3-0 3-6 
 I n   the Museum  o f the  College  of Surgeons  there  are  several  
 Hunterian  prepara tions  of  the  skull  of  this  animal.  
 Nos.  1147,  1148,  1149,  1150,  1151,  showing  the  two  rudimentary  
 tee th  inclosed  in  the  cavity,  in  the  female,  and  
 the  single  one in  the male  skulls.  Narwal  female  skulls  
 have  two  rudimentary  tee th  in  upper jaw, which  are rarely  
 protruded, K n o x .  Iu   the  fcetus,  on  each  side  the  upper  
 jaw,  in  the  usual  place,  are  two  hollow  teeth,  obviously  
 the  extremities  of  the  spiral  permanent teeth  o f the male ;  
 they  arc  completely  imbedded  in  the  jaw,  and  if  the  animal  
 is  a male  the  left  tooth  continues  to)   ggrrooww,,   tthhee   rriijght  
 after a  time  fills  up,  its  central  cavity  for  containing  tlie  
 pulp  disappears,  aud  after attaining  a  groivth of five  or six  
 inches, the jaw  elongates  to  correspond with  the  growth  of  
 the  animal  and the  other  tooth,  and  the  abortive tooth  remains  
 imbedded in  the  jaw for  life.—K n o x ,  T rans. R. Soc.  
 E d in .  ii.  413.  Scoresby  gives  a  very  good  account o f this  
 animal, Arct.  Reg.  i.  131. 
 Tho  best  figures  are  those  of Scoresby,  t.  15,  th en   Sowerby, 
  B r it.  Misc.  t./X   ,  b u t this  has  a  second  horn  erroneously  
 added.  Bonuaterre’s  figure  is  far  too  ventricose.  It  
 has been  (A ie d   by   Lacep.  t.  4,  f.  3,  Blumenbach,  t.  
 and  o t l ic r l^  on  the  other  hand,  D u h ame rs  Pech.  iii.  t.  
 2 6 , /   1,  is  too  slender,  and with  too  small  a head. 
 A n a r n a c u s ,   Lacep.  Monodon,  Fab.  Ancylodon,  l i n ger. 
   Heterodon,  p art, Desmarest,  Cuv. 
 U ppe r jaw with  only two  small,  conical,  slightly curved,  
 b lu n t  teeth,  prominent  in  front ;  lower  jaw   toothless ;  
 body elongate,  roundish;  pectoral distinct ;  dorsal minute. 
 T h e   A n a r n a k .  Anarnacus  Grcenlandicus. 
 Anarnakus Grcenlandicus,  Lacep.  Cet.  164. 
 Monodon  spurius  (Anarnak),  O. Fab.  Fa u n a   Green.  31.  
 Bonnat.  Cetol.  11. 
 De lphinus  anarnacus, Desm. Mam .  520. 
 Black ;  teeth  scarcely  an  inch  long. 
 Inhab. Greenland. 
 T h is   species is  only known  from  F abricius’  desc rip tio n ;  
 he  is  so  accurate  an  observer  that  I  am  loath  to  doubt  the  
 existence  of  anything he  has  described ;  especially  as  he  
 appears  to  have  seen it  himself.  I   am  inclined  to  believe  
 th a t Lacepède  and  Illiger were  right  in  considering it  as  a  
 distinct  genus. 
 M.  Cuvier  [Oss.  Foss.)  regards  it  as  a   Hyperoodon,  
 and  he  only  believed  in  the  existence  o f  one  species  
 of  th e   genus.  M.  F.  Cuvier,  who  misunderstood’  the  
 description  o f  Chemnitz  with  re spect  to  the  te e th   of  
 Balcena rostrata, is inclined to unite  it  to  th a t  species, w’ith  
 which  it  agrees  in  being  all black,  b u t observes  they  differ  
 greatly  in  size. —  F.  Cuv.  Cetac.  226.  I t   cannot be  the  
 young Narwhal,  for  the  back  is  finned. 
 **  Teeth  o f  upper  a n d  lower ja iv   conical,  deciduous. 
 B e l u g a ,  Gray  [Spie.  Zool.),  Lesson,  Bell,  1837.  P h y seter, 
  L in n .  part.  Catodon, A rted i,  part.  Cetus, Brisson,  
 part.  Cachalot,  Lacep.  Delphinapterus,  Lacep.  Del-  
 pliis,  Wagler.  P h o c$ n a , part, F.  Cuv. 
 Tee th  conical only  on  the  front  h a lf o f  the jaw ,  oblique,  
 often  trunca ted,  and  the  upper  often  deciduous ;  head  
 rounded ;  forehead  convex ;  dorsal  fin  none ;  skull with  
 th e  nose  and  the  hinder wing  of the maxilla b en t  down  on  
 the  orbits,  making  the  forehead  very  convex;  lower  jaw   
 not  so wide  as  the  upper, with the condyle  low down  below  
 the middle  o f  th e   hinder  edge ;  pectoral  sub-oval. 
 T h e   genus Delphinapterus  was  formed  by  Lacepède  to  
 contain  this  animal,  which  he  before  described  as  a  Catodon, 
   and  th e  D.  Senedette,  which  is  probably  a  Catodon. 
 T h ere  is  a  great  similarity  in  general  form  between  the  
 skull  o f the  Phoccena,  Beluga  and  Monoceros,  b u t independent  
 of the  size  and  teeth,  they diflèr in  the  form o f the  
 convexity  in  front  o f  th e  blower;  in  Beluga  the  front  of  
 the  blower is  flattish,  in  Monoceros  there  is  a  broad,  halfoblong  
 convexity,  and  in  Phoccena  a   squarish  tuberosity. 
 The N o r t h e r n   B e l u g a .  Beluga Catodon. 
 Physeter Catodon,  L in n ,  from  Balajna minor,  Sibbald.  
 Phal.  5. 
 Balaena  albicans, Muller. 
 Delph.  leiicas, Pallas,  Zool. Ross.  Asiat.  i.  32,  2 .  Mem.  
 We rn .  Soc.  iii.  17,  <?.  Cuv.  Oss.  Foss.  v.  t.  22,  f .   5,  6.  
 Bell,  B r it.  Quad.  4 9 \,fig . 
 Catodon  Sibbaldii, Fleming,  B .  A.  29. 
 B.  borealis. Lesson. 
 Physeter macrocephalus,  8.  Gmclin,  S.  N . 
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