263 



INDEX. 



Abyla, 98,99, 101. 

 Acalephes Simpies, 114. 

 Acalephes Hydrostatiques, 114. 



Acanthoccenia, 246. 

 Acanthocyatlms, 240. 



Acaulis, 87, 88, 89. 

 Acervularia, 158, 244. 



Acontia, 135. 



Acraspedota, 120. 



Acrocyst, 95. 



Actinacis, 247. 



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



Actinidce, 205. 



Actinoloba, 198. 



Actinomeres, 143. 



Actinopsis, 198. 



Actinosome, 143. 



Actinozoa, type of, 131 ; general cha- 

 racters of, 19, 138; development of, 

 170; classification 0^196; distri- 

 bution of, 231; relations of, to time, 

 236. 



Adamsia, 150, 198. 



Adelastrcea, 239. 



Mgina, 116. 



JEginidcc, 120. 



Mginopsis,6o, 116. 



Mquoridce, 120. 



Agalma, 102, 108, no, in, 112. 



Agamogenesis. 74. 



Air-vesicle, of Physophoridce, 101. 



Alcyonaria, general characters of, 139, 

 196, 208 ; nutritive cavity of, 141 ; 

 tentacles of, 148 ; thread-cells of, 

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

 velopment of, 170; families of, 213; 

 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. 



Amceboid condition of Hydra, 11, 52. 

 Amplexus, 238. 



Anabacia, 247. 



Androphore, 45. 



Ammonia, 199. 



Angeastrcea, 246. 



Angel-band, 34. 



Anisophyllum, 244. 



Anomophyllum, 246. 



Antagonism, between development 

 and reproduction, 72. 



Antennularia, 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. 



Apolernia, 102, 108, no, in. 



Apolemiadce, 113. 



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

 242. 



Appendages, of Hydrozoa, 27, 69 ; of 

 Hormiphora, 152 ; of Ctenopkora, 

 218. 



Arachnactis, 163, 199. 



Arceacis, 247. 



Aspidiscus, 246. 



Astrangia, 241. 



Astroccenia, 239. 



Astrcea, 241. 



Astrceidcc, 203, 207, 232, 237, 245—7. 



Astrceopora, 241. 



Astrohcelia, 247. 



Athorybia, 107, 108, no, 112. 



Athovybiadce , 113. 



Atolls, 191 -4. 



Atractyhs, 62, 88, 89. 

 Aulacophyllum, 238. 

 Aulophyttum, 245. 

 Aulopora, 2Q4, 244. 

 Auloporidcc, 204, 206, 237, 244, 245. 

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

 Axophyllum, 245. 

 Axopora, 247. 

 Axosmilia, 246. 



S 4 



