INDEX 
Heavy-faced type is used to indicate names of classes, orders, genera, etc.; heavy- 
faced numerals to indicate the place where the fullest description is given 
A 
Abdomen, 243, 246. 
Abductor muscles, 302. 
Aboral, 202. 
Surface, 201. 
Abyssal, 23. 
Acalephs, 134. 
Acanthalithodes, 240, 271. 
A. hispidus, 240, 271. 
Acephala, 409. 
Acetabularia, 51, 57. 
A. crenulata, 51, 57. 
Acmza, 9, 309, 312. 
A. mitra, 324, 357. 
A. patina, 324, 357- 
A. testudinalis, 41, 42, 324, 
348, 348, 356. 
A. testudinalis, var. 
veus, 324, 357. 
Acmeidz, 324, 356. 
Acontia, 145. 
Acorn-shell, 254. 
Actiniaria, 141, 142, 148, 144. 
Actinozoa, 112, 115, 141, 142. 
Adamsia palliata, 144, 267. 
Adductor muscles, 302, 413, 
al- 
417. 
ZEolididz, 324. 
Eolis, 41, 42, 309, 324, 354. 
4E. papillosa, 324, 354. 
Equoreide, 116, 128. 
tea, 188, 194. 
4. anguinea, 188, 194. 
Agarum, 36, 42, 63, 68, 69. 
Aglaophemia, 127. 
A. struthioides, 116, 127. 
Ahnfeldtia, 76, 82. 
A. plicata, 76, 82. 
Alaria, 63, 69. 
A. esculenta, 41, 42, 63, 69. 
Albunza, 240, 269. 
A. gibbesii, 240, 269. 
Alcyonacea, 141, 151. 
Alcyonaria, 141, 142, 150, 152. 
Alcyonidium, 189, 192, 197. 
A. hirsutum, 189, 197. 
A. hispidum, 189, 198. 
A. parasiticum, 189, 198. 
A. ramosum, 189, 197. 
Alcyonium, 141, 151. 
A. palmatum, 141, 150, 151. 
Aleutian province, 311. 
Alga, 25, 48, 62, 76. 
Botanical facts about, 25. 
Alternation of generation, 120, 
121. 
Amarececium, 473, 477. 
A. pellucidum, 473, 477. 
Auulaers 201, 202, 205, 214, 
8, 
Ambulacral groove, 205. 
Ossicles, 205. 
Zones, 201, 202, 205, 218, 229. 
American division, 24. 
Amphictenidz, 162, 183. 
Amphineura, 300, 316, 317, 
320, 321, 323. 
Amphipoda, 242, 289. 
Amphissa, 312. 
A. corrugata, 326, 389. 
Amphitrite, 161, 182. 
A. ornata, 161, 182. 
Amphiura, 213, 215. 
A, squamata, 213, 215. 
Ampulle, 201, 205, 206, 218. 
Anadyomene, 51, 57. 
A. flabellata, 51, 57. 
Anatomy, 20. 
Of higher Crustacea, 246, 
Anemone Cave, 40. 
Angel’s-wings, 461. 
Animal-flowers, 142. 
Animal life in its lowest forms, 
2i. 
Annelida, 305. 
Annulata, 159, 161, 164, 170. 
Anomia, 405, 424. 
A. aculeata, 405, 425. 
A. lampe, 405, 425. 
A. simplex, 405, 424. 
Anomiidz, 405, 424. 
Anomura, 240, 264. 
Antenne, 243, 246, 258. 
Antennules, 243, 246, 258. 
Antheneidz, 204, 209. 
Anthomedusza, 116. 
Aperture, 302. 
Apex, 343. 
Aphrodite, 161, 174. 
A. aculeata, 161, 174. 
Aphroditidz, 161, 172, 173. 
Aplacophora, 300, 321, 323. 
Aplysella violacea, 105. 
Aplysia Wilcoxii, 352. 
Aplysiide, 324. 
Apoda, 228, 233. 
Appendicularia, 472. 
Arabella, 161, 179. 
A. opalina, 161, 179. 
Arbacia, 217, 222. 
479 
A. punctulata, 217, 222. 
Arbaciade, 217, 222. 
Arca, 310, 405, 425. 
A. noz, 405, 426. 
A. pexata, 405, 425. 
A. ponderosa, 405, 426, 
Arcachon, 434. 
Architeuthis, 465. 
Arcidz, 405, 425. 
Arctic province, 309. 
Arctica, 406, 441. 
A. islandica, 406, 441. 
Arenicola, 162, 172, 184. 
A. marina, 162, 184. 
Arenicolide, 162, 184. 
Argonauta, 464, 467, 468, 
A. argo, 464, 469. 
Aristocratic genera, 313, 377, 
398, 401. 
Aristotle’s lantern, 203. 
Arthrocladia, 62, 67. 
A. villosa, 62, 67. 
Arthropoda, 238, 244. 
Arthrostraca, 242, 289. 
Articulata, 188. 
Ascidia, 473, 476, 
A. amphora, 473, 477. 
A. callosa, 473, 477. 
A. composite, 473, 
A. simplices, 473. 
Ascidiacea, 473. 
Ascidians, 8, 474. 
Compound, 474, 477. 
Simple, 474, 475. 
Ascophyllum, 63, 73. 
A. nodosum, 43, 63, 73. 
Asperococcus, 62, 66. - 
A. echinatus, 62, 66. 
Astacoide, 240, 261. 
Astarte, 309, 406, 440. 
A. castanea, 406, 441. 
A. undata, 406, 441. 
Astartidz, 406, 440. 
Asterias, 204, 212. 
A. Forbesii, 204, 207, 212. 
A. gigantea, 204, 207, 212. 
A. ochracea, 204, 212. 
A. vulgaris, 43, 204, 207, 
212. 
Asteriidz, 204, 212. 
Asterina, 204, 210. 
A. folium, 204, 210. 
A. miniata, 204, 211. 
Asterinidz, 204, 210, 
Asteroidea, 200, 204, 205. 
Astrea, 141, 146, 147, 148, 
