INDEX. 



269 





80, 101 ; development of, 57 ; pneu- 

 matophore of, 101, 107 ; ccenosarc 

 of, 107 ; nectocalyces of, 107 ; hydro- 

 phyllia of, 108 ; polypites of, 29, no ; 

 hydrocysts of, 40, no ; tentacles of, 



32—4, Hi ; gonophores of, 47, in ; 

 families of, 113 ; distribution of, 



127, 128. 



Phytogyra, 246. 



Figment masses, of Hydrozo a, 36, 38 ; 

 of Actinozoa. 152. 



Placoccenia, 246. 



Placostm'lia, 246. 



Placosphyllia, 246. 



Plan of structure, of Ccelenterata, 3, 

 19 ; of Hydrozoa, 17, 19, 25 ; of Ac- 

 tinozoa, 17, 19, 138. 



Plan u la, 64. 



Platytrochus, 247. 



Plerastrcea, 239. 



Plesiastrcea, 241. 



Pleurobrachia, form and structure 

 of, 143, 216, 221 ; thread-cells of, 

 151 ; nervous system of, 168 ; tactile 

 organs of, 168 ; development of, 

 180 ; tentacles of, 225 ; distribution 

 of, 235. 



Pleurobrachiadce, 230, 



Pleuroccenia, 239. 



Pleurocora, 247. 



Pleurodictyum, 244. 



Plumularia, 34, 44, 50, 93,94. 



Pneumatic filaments, of Velella and 

 P or pita, 102, 106. 



Pneumatocyst, of Physophoridce, 101 ; 

 of Velella, 105. 



Pneumatophore, of P hy sop hor idee, 

 101, 107. 



Podactinaria, 120. 



Podocoryne, 88, 112. 



Polyccelia, 245. 



Polypary, of Corynidce and Sertula- 

 rides, 35, 85, 92. 



Polype, 139; of Zoantharia, 197; of 

 Alcyonaria, 208. 



Polype-cells, ot Sertularidce, 35. 



Polypi te, 25, 29 ; of Hydridce, 20, 82 ; 



of Corynidce, 85 ; of Sertularidce, 



92 ; of Calycophoridce, 29, 99 ; of 



Physophoridce, no; of Medics idee, 



115 ; of Lucernaridce, 47, 65, 121, 

 123. 



Polytremacis, 247. 



Pontes, 232, 241. 



Poritidce, 204, 207, 237, 244, 246, 247. 



Porpita,iz, 45, 102, 103, 107, no— 112. 



Pouches, of JEginidce, 116, 120. 



Praya, 98, 99. 



Prayidce, 100. 



Prehensile organs, of Uydrozoa, 32 ; 



of Actinozoa, 148. 

 Prionastrcea, 241. 

 Propora, 238. 

 Protarcea, 244. 

 Protoplasm, animal, 7. 



Protoseris, 246. 



Protovirgularia, 243. 



Protozoa, their minute structure, 

 compared with that of Ccelenterata, 

 7 ; development of, 14, 18. 



Protozooids, 74. 



Proximal extremity, of hydrosoma, 



25 ; of polypite, 29. 

 Psaimnopora, 238. 

 Pterygia, 150. 



Ptychophyllum, 238. 



Pyloric valve, of Calycophoridce, 29. 

 Pyrgia, 204, 245. 



Radial canal system, of Ctenophora, 

 219, 221. 



Recent Actinozoa, 248. 



Regular gemmation, 184. 



Reniform enlargements, of tentacle 



in Physalia, 33, in. 

 Renilla, 212. 



Reparative powers, of Uydrozoa, 52, 

 55 ; of Actinozoa, 182. 



Reproductive organs, of Hydrozoa, 

 40 ; of Actinozoa, 134, 169 ; of ify- 

 tfrzVfa?, 23 ; of Corynidce, 88 ; of 

 Sertularidce, 93 ; of Calycophoridce, 

 99 ; of Physophoridce, hi; of A/r- 

 dusidce, 40, 118 ; of Lucernaridce, 

 40, 47 ; of Zoantharia and Alcyon- 

 aria, 134, 169, 209 ; of Ctenophora, 

 169. 



Respiration, in Ccelenterata, 6, 209. 



Reticular ia, 91. 



Rhabdophylha, 239. 



Rhabdopora, 245. 



Rhipidogyra, 239. 



Rhizangia, 240. 



Rhizophysa, iqi— 2, 107, no— 1. 



Rhizophysiadce, 114. 



Rhizostoma , 49, 67. 



Rkizostomidce \ 49, 125. 



Rhodarcea, 241. 



Reenter ia, 244. 



Rugosa, corallum of, 158, 173, 214; 



families of, 215 ; relations of, to 



time, 237, 243. 



Saccanthus, 199, 200. 

 Sacculus, of tentacle in Hydrozoa, 33. 

 Sarcode, 7, 11. 

 Sarcodictyon, 151, 160, 209. 

 Sarsia, gemmation of, 63. 

 Sclerenchyma, 161. 

 Sclerites, of Gorgonidce, 161. 

 Sclerobasic corallum, 153 ; develop- 

 ment of, 185. 

 Sclerobasic Zoantharia, 154, 162, 201, 



234, 237. 

 Sclerodermic corallum, 155, 173, 186. 

 Sclerodermic Zoantharia, 158, 161, 



173, 202, 234. 237. 

 Scyphistoma, 66. 

 Sea- Anemones, 131 162, 198. 

 Sea-Fir, 90 



