268 



INDEX. 



Melilcea. 154, 210. 



Membrana intermedia, 16. 



Menophyllum, 245. 



Mertensia, 235. 



Merulina, 208. 



Merulinidce, 208, 237. 



Mesenteries, of Actinozoa, 132 — 4, 137, 



146, 172. 

 Metagenesis, 74. 

 Metamorphosis, 73. 

 Metastrcea, 247. 

 Michelinia, 238. 

 Micrabacia, 247. 

 Micropyle, of animal ovum, 71. 

 Microsolena, 246. 

 Millepora, 239. 



Milleporidce, 205, 206, 237, 244, 247. 

 Mint/ as, 163. 

 Mceandrastrcea, 246. 

 Mceandrina, 142, 187, 199, 203,232, 239. 

 Monoecious forms, of Hydrozoa, 50, 



112; of Actinozoa, 169, 209. 

 Monti ivaultia, 239. 

 Mopsea, 154, 210, 241. 

 Mouth, of Hydrozoa, 29, 86, 88; of 



Actinozoa, 131,141; of Ctenophora, 



218. 

 Movements, of Hydrozoa, 23, 27, 36; 



of Actinozoa, 138, 162, 210; of C'te- 



nophora, 229. 

 Mucous layer, of blastoderm, 16. 

 Mulberry-mass, 16. 

 Muscular system, of Hydrozoa, 36 ; 



of Actinozoa, 162. 

 Mycetophyllia, 240. 

 Myriothela, 82, 87. 



Nectocalyces, 27, 36, 70 ; of Calyco- 



phoridce, 96—9 ; of Phy sop hor idee,, 



107; of Medusidcs, 116. 

 Nectocalycine canals, 37. 

 Nectosac, 36. 



Nematophores, of Sertularidcs, 34, 93. 

 Nemopsis, 84. 



Nervous system, of Medusidcs, 39 ; of 



Actinia, 166 ; of Ctenophora, 167. 

 Neural region, 17. 



Nutritive organs, of Hydrozoa, 28 ; of 

 Actinozoa, 141. 



Oceania turrita. marginal bodies of, 



38. 

 Oceanidce, 119. 



Ocelli, 38. 

 Oculina, 240. 



Oculinidcs, 203, 207, 237, 246, 247. 

 Ocyroe, 234. 

 Oldhamiae, 130. 

 Qmphyma, 244 



Operculum, of Campanularia fasti- 

 giata, 92. 



Oral canals, of Ctenophora, 220. 

 Order, of septa, 175. 



Orders, of Hydrozoa, 79 ; of Actino- 

 oa, 196. 



2 



Organ-pipe Corals, 209. 

 Oroseris, 239. 

 Otolites, 39. 



Outer layer, of blastoderm, 16. 

 Ova, of animals, 14, 71 ; of Hydrozoa, 



50 ; of Actinozoa, 169. 

 Ovaria, of Hydrozoa, 40, 50; of ^c- 



tinozoa, 169. 



Ovigerous vesicles, of Sertularidcs,^]. 



Pachygyra, 239. 



P achy phy Hum, 244. 

 Pali, 155. 



Palcsocyclus, 244. 

 Palpocils, 93. 

 Palythoa, 141. 

 Paracyathus, 240. 



Paragastric canals, of Ctenophora, 

 145, 220. 



Parasitic forms, of Hydrozoa, 61, 83 ; 

 of Actinozoa, 198, 233. 



Parasmilia, 246. 



Parietal gemmation, of Actinozoa, 183. 



Parthenogenesis, 74 ; theory of, 78. 



Pavonaria, 240. 



Peachia, 142, 199, 200. 



Pedicle, of tentacle in Hydrozoa, 33. 



Peduncle, of polypite, 29, 31. 



Pelagia, structure of, 40, 123 ; de- 

 velopment of, 68 ; phosphorescence 

 of, 129. 



Pelagidcs, 125. 



Pennaria, 87—9. 



P 'ennatula, 212 — 3, 232. 



Pennatulidce, 163, 186,210—3,214,235, 

 237, 246, 247. 



Pentaccenia, 246. 



Peplosmilia, 246. 



Perforata, 158, 161, 203, 206, 237, 242. 



Perigonimus, 87 — 9. 



Periplast, 10. 



Peristomial space, 132, 198. 



Permian Corals, 245. 



Phanerocarpae, 120. 



Phillipsastrcea, 238. 



Philomedusa, 142, 233. 



Phosphorescence, of Ccelenterata, 7 ; 

 of Hydrozoa, 128; of Pennatulidce, 

 212 ; of Ctenophora, 230. 



Phyllactis, 200. 



Phyllangia, 241. 



Phyllocoenia, 240. 



Phyllocyst, 36. 



Phyogemmaria, of Velella, 105. 



Physalia, thread-cells of, 5 ; villi of, 

 31; tentacles of, 32, 33, Hi; develop- 

 ment of, 58 ; pneumatophore of, 

 101, 107; gonophores of, 111, 112: 

 distribution of, 127. 



Physaliadce, 114. 



Physical elements, relations to, of 

 Hydrozoa, 126; of Actinozoa, ill. 



Physophora, 102. 107—12. 



Physophoriadcs, 113. 



Pky sop ho?' idee, general characters of, 



