263 



INDEX. 



Abyla, 98, 99, loi. 



Acalephes Simples, 114. 



Acaleuhes Hydrostatiques, 114. 



Acanthoccctiia, 246. 



Acanihoci/at/ius, 240. 



Acaulis, 87, 88, 89. 



Accrvularia, 158, 244. 



Acontia, 1^5. 



Arraspeda, 120. 



Acrocyst, 95. 



Actinacis, 247. 



Actinia, 131, 146, 166, 172, 199, 235. 



Actinidip, 2oy. 



Actinoluba, 198. 



Actinomeres, 14J. 



Aclinopsis, 198. 



Actiiiosome, 143. 



Actinozoa, type of, iji ; general cha- 

 racters of, 19, 138 ; development of, 

 170 ; classification of, 196 ; distri- 

 bution of, 231; relations of, to time, 

 236. 



Adamsia, ijo, 198. 



Adelastrwa, 239. 



jEgina, 116. 



jEginidce, 120. 



Mginopsis, 60, 116. 



JEquoridce, 120. 



Agalma, 102, 108, no, lir, 112. 



Agamogenesis, 74. 



Air-vesicle, oi Physophoridce, loi. 



Alcyonaria, general characters ol, 139, 

 196, 208 ; nutritive cavity of, 141 ; 

 tentacles of, 148; thread-cells of, 

 151 ; corallum of, 154, 159, 162 ; de- 

 velopment of, 170 ; families ot, 2ij; 

 distribution of, 231, 233 ; relations 

 of, to time, 237, 243. 



Alcyonidce, 213 ; corallum of, 160, 162, 

 209. 



Alcyonium, 161, 208, 232, 235. 



Alimentary canal, of Ccelenterata, 3, 

 29, 141. 



Alternate generation, 76. 



Alveolites, 238. 



Amoeboid condition of Hydra, 11, 52. 



Amplextis, 238. 



Anabacia, Z47. 



Androphore, 45. 



Ane77ionia, 199. 



Angeastraa, 246. 



Angel-band, 34. 



Anisop/iyllufn, 244. 



Anomophyllujn, 246. 



Antagonism, between development 

 and reproduction, 72. 



Antenvularia, 57, 127. 



Anthea, 182, 199, 201. 



Antipathes, 200, 201. 



Antipathidcc, 206. 



Apertures, of somatic cavity in Acti- 

 nozoa, 142. 



Apical area, of Ctenophora, 143, 145, 

 219. 



Apical canals, 145. 



Apical pores, 142, 145. 



Apolemia, 102, 108, no, in. 



ApolemiadiS, 113. 



Aporosa, 158, 161, 162, 203, 206, 237, 

 242. 



Appendages, of Hydro%oa,i'j,&^% of 

 Hormiphora, 152 ; of Ctenophora^ 

 218. 



Arachnactis, 163, 199. 



Arteacis, 247. 



Aspidiscus, 246. 



Astrangia, 241. 



Astroccenia, 239. 



AstrcBu, 241 . 



Astrwida:, 20j, 207, 232, 237, 245—7. 



AstrcBopora, 241. 



A&irohtelia, 247. 



Athoryhia, 107, 108, no, 112. 



Athorybiada;, i\i. 



Atolls, 191 -4. 



Atractylis. 62, 88, 89. 



Aulacophyllum, 238. 



Aulophyilum, 245. 



Aulopora, 204, 244. 



AtiloporidcE, 204, 2c6, 237, 244, 245. 



Aurelia, 47, 64, 123, 127, 128. 



Axophyllum, 245. 



Axopora, 247. 



Axosjnilia, 246. 



S 4 



