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o incui'vatis in f o r n o s iib iin ilu te ra lito r, a p i c e s i ib d i v a r i c a to -
ramiilo s i s , r am u l i s p a t e n t i s s im i s a basi l a t io r e a c nmin a l is .
llab. in o c e a n o a t la n t ic o a d litliis A m e r i cæ b o r e a l i s (Ra fn .!).
Fro n s a radice s cu ta ta 4-poll icaris e t ult ra, in forno cras s it ie p e n næ
corvinæ, mox dicliotomo- ramosa, ramis infimis elongati s patent i s s imis , unde
frons fere latior ovadat q u am longa. Rami d ocompos i to-dicholomi , segmentis
su p e r io r ib u s nuno bipol licar ihus indivis is incurvat i s et ex t ro r sum
ramulos is , nuno infra apioem dichotomis, s egment is divar icat is ramulos is .
Ramuli patent i s s imi fere hor izontal i ter exe u n te s a u t in di visi e t a bas i
latio ri s ens im acuminat i , a u t ipsi diva r ioato- ramulos i . Subs tant ia s u b g e la
tinosa ca rnos a. Ex s ic cat ione admo d um oont rahi tur , co rnea evadi t atque
longi tudinaliter rugos a e t sulcata. Specimina no s t r a s ter i lia e t decolorata .
S t ru c tu r a oum p r iore convenit.
16. Gli. CAüD.VTA (./. Ag. mscr.) f r o n d o t e r e t i c ra ssa c a r n o s o - c o r n c a
e lo n g a t a e t l a t e r a l i t e r r am u l o s a , r am i s in f o r n o d i c b o t o r a o -
r am i i l o s i s , s i ip o r n e p r o l o n g a t i s n u d i u s c u l i s , s e gm e n t i s b asi
sn bæq iia lib iis a p i c e a c um in a t i s , co c c id iis b em i s p bæ r i c i s p e r t o t am
f r o n d em s p a rsis.
llab. in m a r i In d iæ o c c id e n t a l i s a d I n s u l am St. Cru c is (R a fn .!)
in s in u Me x ic a n o (Ilb . C r o u a n ! ) .
Frons 6-poll ioaris, oras s itie p e n næ columbinæ, ramis la teral ibus p a te
nt is s imi s subl ior izontal ibus p e r totam longi tu d in em dens e obsita. Rami
2— 6-poll ioares , ju x ta bas in d ens e al terne ramosi , ramifioat ione magis la terali
tor ramulosa q u am dichotoma, apice rami plus minus p ro d u c to n u -
diusGulo, h. e. in in fer iore p a r l e ramulis s impl icibus pauc is obs ito, in
su p e r io re fere nudo. Rami r amul ique omne s bas i subæqiiales , breviores
evident ius acuminat i, longiores longe at tenuat i . Subs tant ia ca rnos a, minus
gelat inosa quam in p ræ c e d e n t e ; exs ic cat ione eodem modo col labi tur. Color
re c e n t i s p u rp u r e u s , ex s io c a tæ sæp e a lbe s c ens . Coccidia h emi s p hær ic a ,
diame t rum dimidium ips ius f rondis vix æquant ia , d emum mamil lata. Pla centa
elevata , cellu lis rotunda t is contexta, fila gemmidi ifera plur ima su s t i -
nei is. P e r ic a rp ium c ra s sum dens is s ime cellulosum, cellulis e xte r ior ibus
plur imis ver t ical iter ser iatis , int imis conc ent r ico dispos itis. Cellulæ p e r i -
p h e r ioæ in fila vert ical ia evolutæ.
17. Gr. cornea (.j. Ag. mscr.) f r o n d e t e r e t i c r a s s is s ima c a n i o s o -
c o r n e a e lo n g a t a e t l a t e r a l i t e r r am o s a , r am is r am u l i s q u e s u b -
c o n f o rm i lm s u t r i n q u e a t t e n u a t i s , r am u l i s s u b s e c u n d a l i s o b tu sis.
■Analysis a Montagneo ip so data e t s t ru c tu ræ e t s p hæro sp o r a rum p la n -
lam a Ilypneis dive r sam e t Gracilariæ p roximam mons t ra t . Inte r Graci -
larias cum Gr. Damæcorni no s t r a p ot i s s imum conveni re vide tur .
Hab. in o c e a n o a t la n t ic o ad P e r n am b u c c o ? (Hb . A r e s c b o u g ! ) .
F rondes a radico s cu ta ta plure s , erec t iuscuiæ, peda les cras s it ie calami
scriptorii, te retes , di s ta n te r ramosæ. Rami 2— 3-poll icares i r regular i ter
unilaterales , ramulos sn b se cu n d a to s emi t tentes . Ramuli poll ioares ' s impl i -
ciusculi , cæt e rum rami s conformes , medio valde incras sat i, bas i evidenter
cons tr icti ap iceque obtuso at tenuat i . Madefacta ca rnosa e t fragilis, ramulis
ad ortura facile delab en t ib u s ; ex s ic c a tæ subs tant ia c o rn e a e t color lividns.
Hæc e t p ræc e d o n te s species , nomine Fuci Wrighti i in col leet ionibus
obveniunt, a vera specie Turne riana, u t hano inte ll igo, r êvera longe diver
sæ. Hano enim planam, hinc longi tudinal i ter canaliculatam, illinc oon-
vexam, dio it Tu rne rus , quod in species prææedentes te retes , exs ic cat ione
sulca tas (non canal iculatas ) h aud quadrat .
18. Gr . W rightii [Turn. Hist. tab. 1 4 8 ) f r o n d e ’» c ra ssa c om p r e s s a
e t s u b p l a n a c a n a l i c u l a t a c a r n o s o - c o r n e a d e c om p o s i t o - d i c h o t om a ,
s e gm e n t i s p a t e n li s s im is , t e rm i n a l i b u s o b tu s is a u t em a r g i n a t o -
d lv a ric a tis , c o c c id ii s la te r a l ib u s b em i s p bæ r ic i s .
Fu c u s Wr ightii T a rn . H isl. Fuc. tab. 148.
Plocar ia Wr ighti M o n t. Pl. Ce.lt. E x o t. IV . p , 46. el Pug. Alg. Yem.
M. 1 1 ! (excl. syn.)
Chondr ia Wrightii Ag. Sp. Alg. p . 364! (excl . syn.)
Laurencia Wr ightii K ü tz . sp . p . 837!
? Fu c u s debi lis F o r s k . Et. Æ g . A ra b . p . 101.
Hab. in m a r i r u b r o ; ad in s u lam M a r t i n iq u e I n d iæ o c c id e n ta lis
(D u p e r r e y ! ) ,
Frons elata 3—S-poll ioaris , 1 % — 2 lineas la ta , e t % fere lineam
cras sa, madefacta p la n o - c an a l icu la ta (!J, exs ic cat ione in su p e r rugosa, c a r -
ti lagineo-cornea . Rami conformes ir regular ius dichotomi , axillis p atent ibus ,
au t p a tent i s s imis in segme nt i s lateral ibus . Segme nta terminal ia dilata ta ,
ro tu n d a ta a u t t runc ata, mox emarginato-bi f ida div ar icata. Margines sæp e
promin en t i i s minut is ver rucos i. — Nost ra specimina decolorata, ex æ r u -
ginoso- lutescont ia, colore fere ce ræ. Habitus Chondri. S t r a tum inter ius
in f ronde adul ta cellu lis p ermagnis , cras s is pa r ie t ibus flexuosis ins t ruc t is
cons tat. S t ratum p e r ip h e r icum cellu lis radiat im in fila ver t ical ia disposit is et
ana s tomo s ib u s invicem conjunct i s cons t i tutum e s t ; in fronde juvenil i velut
e t fruct ifera s t r a tum p e r ip h e r icum magis evolutum majorem p a r tem sect ionis
transve rsal is oc c upa re videlur . Coccidia (sec. Montagne) lateral ia convexa
apice d e p r e s s a e t d emum p e r fo r a t a ; p e r ic a rp ium cum s t rato pe r iphe r ico
frondis s t ru c tu r a convenit. Fila gemmidi ifera a p la c en ta cellulosa quoquover
sum radiantia, a r t icúlala e t ramosa . Gemmidia iu ar t icul is super ioribus
evoluta oblongo-pyr i formia.
Nost ra specimina e t Montagnei, u t ex eodem fonte provenient ia, sine
dubio congruent ia. Plan tam e ma r i rubro non vidi. Locus natalis sp e ciem
d ive r sam s ane su a d e r e t ; auc tor i ta te a u tem Montagne i , qui hano
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