INDEX. 



269 



80, loi ; development of, 57 ; pneu- 

 niatopliore of, loi, 107; ccenosarc 

 of, 107 ; nectocalyces of, 107 ; hydro- 

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

 hydrocysts of, 40, no ; tentacles of, 

 32—4, III ; gonophores of, 47, in ; 

 families of, 113 ; distribution of, 

 127, 128. 



Phytogyra, 246. 



Pigment masses, of Hydrozoa, 36, 38 ; 

 oi Actinozoa. 152. 



Flacoccenia, 246. 



Placosmilia. 246. 



Placosphyllia, 246. 



Plan of structure, of Ccelenterata., 3, 

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

 tinozoa, 17, 19, 138. 



Planula, 64. 



Platytrochus^ 247. 



Plerastrcea. 259. 



Plesiastrcea, 241. 



Pleurobrackia, form and structure 

 of, 143, 2x6, 221 ; thread-cells of, 

 151 ; nervous system of, 168 ; tactile 

 organs of, 168 ; development of, 

 180 ; tentacles of, 225 ; distribution 

 01, 235. 



Pleurohracluadce, 230, 



Pleuroccenia, 239. 



Pleurocora, 247. 



Pleurodictyum, 244. 



Plumularia, 34, 44, 50, 93,94- 



Pneumatic filaments, of Vclella and 

 Porpita, 102, 106. 



Pneuiriatocyst, of Fhysophoridcc, loi ; 

 of Velella, 105. 



Pneumatophore, of Physophoridcs, 

 loi, 107. 



Podactinaria, 120. 



Podocoryne, 88, 112. 



Polyccelia, 245. 



Polypary, of Corynidce and Sertula- 

 ridce, 35, 85, 92. 



Polype, 139; of Zoantharia, 197; of 

 Alcyonaria, 208. 



Polype-cells, of ScrtulaHdcB, 35. 



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

 of Corynidce, 85 ; of Sertidaridcs, 

 92 ; of Calycophorida:, 29, 99 ; of 

 Physophoridce, no; oi MedusidcCy 

 115 ; of LucernaridcB, 47, 65, 121, 

 123. 



Polytremacis, 247. 



Forites, 232, 241. 



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



Porpita, 11, \s,ioz. 103, 107,110—112. 



Pouches, of JEghiidce, 116, 120. 



Praya, 98, 99. 



Prayidce, 100. 



Prehensile organs, of Hydrozoa, 32 ; 

 of Actinozoa, 148. 



Prionastrcea, 241. 



Propora, 23S. ~- 



Prolartsa, 244. 



Protoplasm, animai, 7. 



Protoseris, 246. 



Protovirgularia , 243. 



Protozoa, their minute structure, 

 compared with that of Coplenteraia, 

 7 ; development of, 14, 18. 



Protozooids, 74. 



Proximal extremity, of hydrosoma, 

 25 ; of polypite, 29. 



Psannnupora, 238. 



Pterygia, 150. 



Ptychophyllum, 238. 



Pyloric valve, of Calycoplioridce, 29. 



Pyrgia, 204, 245. 



Radial canal system, of Ctenophora, 

 219, 221. 



Recent Actinozoa, 248. 



Regular gemmation, 184. 



Reniform enlargements, of tentacle 

 in Physalia, 33, ni. 



Benilla, 212. 



Reparative powers, of Hydrozoa, 52, 

 55 ; of Actinozoa, 182. 



Reproductive organs, of Hydrozoa, 

 40 ; oi Actinozoa, 134. 169 ; of Hy- 

 drides, 23 ; of Corynidce, 88 ; of 

 Sertularidce. 93 ; c\{'Calycophoridce, 

 99; of Physophoridce. in ; of Me- 

 dusidce, 40, 118; of LucernaridcB, 

 40, 47 ; of Zoantharia and Alcyon- 

 aria, 134, 169, 209 ; of Ctenophora, 

 169. 



Respiration, in Ccelenterata, 6, 209. 



Reticularia, 91. 



RhabdophylUa, 239. 



Rhabdopora, 245. 



Rhipidogyra, 239. 



Rhizangia, 240. 



Rhizophysa, loi— 2, 107, no— i. 



Rkizophysiadce, 114. 



Rkizostoma, 49, 67. 



Rkizostornidce, 49, 125. 



Rhodarcea, 241. 



Rcemeria, 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, n. 



Sarcodictyon, 151, 160, 209. 



Sarsia, gemmation of, 63. 



Sclerenchyma, 161. 



Sclerites, of Gor^fTow/rfij-, 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, go 



