INDEX. 



271 



Trachypora, 144. 



'J'riaSsic Coral*, 145. 



Trichydra 82. 87, 89. 



'I'ritozooiiU. 74. 



Trochucyathiis, 239. 



Trochophi/lluni, 245. 



Trochusfiis, 247. 



Trochosinilia. 239. 



fubipora, 209. 



Tubiporidce, 159. 162, Z09. 21 j. an- 



TubtUarin, ji, ;2, 44, 54, 8j — 9, 127. 



Tuhn/tinud^e, 89. 



TubHlarilcE, 90, 



Tiihtdaiir.a, 90. 



Tubulosa, 159, 162, 204, 206, 2J7, 242, 



^^^ . 

 Titrhmaria, 241. 



Turbinolia. 247. 



Turbniolidce, 202, 207, 2jj, 2J4, 237, 



246, 247. 

 Turns, 62. 

 Turn'topiis, 61. 

 Tvpe, of Hydrozoa, 20; of Actinozoa, 



iji 



L'locyathHS, 232. 



Ulophyllia. 239. 



Utubellularia, 235. 



Umbrella, of I.ucernaridte, 27, 37.47, 



124. 

 Urticating organs, of Coclenterata, 3. 



Vacuolation, of tissues, 8, 32. 

 Vegetative repetition, 73. 

 Veil, of nectocalyx, 36, 116. 

 VeleUa. form and structure of, 104; 



development of, 59 ; pneumatocyst 

 of, 102, 105 ; tentacles of, 32, III , 

 polypites of, 105, 110, 114; gono- 

 phores of. 45. iiz — 3; glaiKiularsacs 

 of, 106 ; distribution of, 127. 



Vtlellida, 114, 



Veretillum, 212. 



Vesicles, of Medusidce, 37. 



Villi, of polypite, 31. 



Virgularia, 212, 241. 



Vital endowments, of lower animals, 

 10. 



Vitelline membrane, 15. 



Vogtia, 45, 99. 



I'orticlava, 82, 85—7, 89. 



Warts, of Sea-anemones, 149. 

 Willsia, canals of, 116. 



Yolk, 14. 



Yolk-division, 15, 51, 170. 



Yolk-sac, 15. 



Zaphrentis, 214, 238 



Zoaiitharia, ueneral characters of, 

 139, 169, 196; polypes of, 131, 141, 

 197; tentacles of, 148, 199; thread- 

 cells of, 150; corallum oi, 158—62, 

 173, 186, 201— 5 ; free-swimming 

 forms of, 163 ; families of, 201, 205 ; 

 development of, 170 ; distribution 

 of, 232—6; relations of, to time, 237, 

 242. 



ZoanthidcE, 162, 199, 201, 206. 



Zonnthus, 160, 235. 



Zooids, 74. 



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