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FIO. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. C a r i n a r i a A t l a n t i c a . Natural size. Surface. (No. 4) C lio p y r a m i d a . t a , Browne. Slightly enlarged. Surface. (No. 4 ) .......................................................................................................... T r i p t e r a c o l u m e l l a . Twice th e n a tu ra l size. (No. 4 ) ........... C y s t o s o m a n e p t u n i , Guerin-Meneville. Slightly reduced. (No. 107) ................................................................................................. E u p l e c t e l l a a s p e r g i l l u m , Owen. H a lf th e n a tu ra l s i z e . E u p l e c t e l l a s u b k r e a (sp. n.). Reduced one-third. (No. 5 ) ... N a r e s i a c y a t i i u s (s p . n . ) . Slightly enlarged. (No. 6 ) ................ S a l e n i a v a r i s p i n a , A. Ag. Four t im e s t h e n a t u r a l s iz e . (No. 6 ) .......................................................................................................... S a l e n i a v a r i s p i n a , A. Ag. Showing t h e s t r u c t u r e of t h e a p i c a l disk .......................................................................................................... P i i o rm o s o m a URANUS (sp. n.). N a tu ra l size. (No. 6) ............. P h o rm o s o m a URANUS (sp. u.). Apical surface. N a tu ra l size. (No. 6) ................................................................................................. P h o r m o s o m a h o p l a c a n t i i a (sp. n.). Southern Sea between Australia and New Zealand. P o rtio n of th e v en tra l surface of th e test. Reduced one-third ............ ......................................... U m b e l l u l a r i a g r o e n l a n d i c a , L. N a tu ra l size. (No. 7) D i a g r a m s h o w i n g t h e d i r e c t i o n a n d f o r c e o f t h e w i n d ( d i r e c t i o n s o u t h - w e s t b y C o m p a s s ; f o r c e = 7 b y B e a u f o r t ’s s c a l e ) a t m i d n i g h t , . J a n u a r y 1st, 1873 ............. PoLiopOGON amadou (sp. u.). Oue-third th e n a tu ra l size. (No. 3 ) .......................................................................................................... A r c a ( s p .) (N o . 5 ) ............................................................................................................. L im o f s i s ( s p .) (No. 5) ............................... ........................................ L e d A (sp.) (No. 5) ... .............................................................................. WiLLEMCESiA LEPTODACTYLA, V. Wlllemces-Suhm. N a tu ra l size. (No. 13) ................................................................................................. SoLA-RiUM (sp.) Greatly enlarged. (No. 13) ............................... A n t e n n a r i u s m a r m o r a t u s . N a tu ra l size. From th e surface... A v i c u l a ( s p .) Greatly enlarged. (No. 16)......................................... G l o b i g e r i n a b u l l o i d e s , from th e s u r f a c e ......................................... O r b u l i n a UNivERSA, D ’Orbiguy. From th e surface. Fifty times th e n atural size ........................................................... ...................... P u l v i n u l i n a m e n a r d i i , D ’Orbigny, a, th e upper, 6, th e u n d e r surface. Th irty times th e n a tu ra l size. Dead shells from the bottom, a t a d ep th of 1,900 fathoms.................................................. A ‘ P h a b d o s p h e r e . ’ From th e surface. Five hundred times the n a t u r a l s i z e ..................................................................................... ............................ A ‘ P h a b d o s p h e r e . ’ From the surface. Two thousand times the n atural size ............ .................................................................... 121 124 125 130 134 139 143 145 146 146 147 148 150 160 175 179 179 180 189 191 195 195 211 214 218 221 222 FIG. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. Gl. 62. 63. 64. 65. 66. 67. 68. 69. 70. 71. 72. 73. 74. 75. With the p.seudopodia Two hundred times the C a l c a r o m m a c a l c a r e a (sp. n,). contracted. From the surface. natural size.................................... D ic t y o p o d iu m (sp. n.). From the surhice. Two hundred times the natural size ..................................................................... X ip h a c a n t h a (sp. n.). From the surface. One hundred times the natural size. The skeleton only........................................... H a l io m m a (sp. u.). From the surface. Two hundred times the natural s iz e .............................................................................. C u r v e s c o n s t r u c t e d f r o m S e r ia l S o u n d in g s b e t w e e n T e n e r i f f e a n d S o m b r e r o ........................................................................... C u r v e s c o n s t r u c t e d f r o m S e r ia l a n d B o t t o m S o u n d in g s . A, in the Bay of Biscay . B, off the coast of Portugal; and C and D, between Teneriffe and Sombrero................................. D ia g r a m c o n s t r u c t e d f r o m S e r i a l S o u n d in g N o. 10........... D ia g r a m c o n s t r u c t e d f r o m S e r ia l S o u n d in g N o. 1 W i l l e m c e s ia c r u c i f e r , V. W-S. X 2. (No. 23)........................... A s t a c u s z a l b u c u s , V. W-S. (No. 23)............................................ C h -e t o d e r m a NiTiDULUM, Loven. (No. 24) T r o c h o c y a t h u s c o r o n a t u s , Pourtales, X 2. (No. 24) D e l t o c y a t i iu s a g a s s i z i i , Pourtales, X 4. (No. 24)........... D e l t o c y a t h u s a g a s s i z i i , Pourtales. Stellate variety. From a depth of 200 fiithoms, near Bermudas .................................... C r y p t o h e l i a puDiCA, Milne-Edwards. Twice the natural size. (No. 24) ............................................ H y a l o n e m a t o x e r e s (sp. n.). Upper surface, natural size. (No. 24) ...................................................................................... H y a l o n e m a t o x e r e s (sp. n.). Lower surface of the sponge, natural size. (No. 24) ............................................................. H y a l o n e m a t o x e r e s (sp. n.). Part of the membrane from the upper surface, X 40. (No. 24) ............................................ H y a l o n e m a t o x e r e s (sp. n.). A young specimen, X 2. (No. 24) T h e r m o m e t e r T u b e s b r o k e n b y p r e s s u r e a t S t a t io n 25. A, Thermometer No. 39 ; B, No. 42 .................................... C u r v e s c o .n s t r u c t e d f r o m S e r ia l T e m p e r a t u r e S o u n d in g s BETWEEN S t . T h o m a s a n d B e r m u d a s ....................................... G r o u p o f g r u - g r u p a l m s o n t h e c r o q u b t - l a w n , M o u n t L a n g t o n ....................................... S t r a t i f i e d ‘ 2 E o l i a n ’ r o c k .s, B e r m u d a s ........................... ‘ S a n d -g l a c i e r ’ o v e r w h e l m in g a g a r d e n , F l b o w B a y , B e m u d a s . (From a Photograph.)............................................ C h im n e y o f a C o t t a g e w h ic h h a s b e e n b u r ie d b y a s a n g l a c i e r , F l b o w B a y , (From a Photograpli.' 233 234 235 236 238 241 243 243 257 260 264 266 269 271 272 274 275 277 278 282 286 301 309 310 312