INDEX. 



271 



Trachypora, 244. 



Triassic Coral>, 245. 



Trichydra 82, 87, 89. 



Tritozooids, 74. 



Trochocyathus, 239. 



Trochophyllum^ 24.5. 



Trochoseris, 247. 



Trochosmilia, 239. 



Tubipora, 209. 



TubiporidiB, 159, 162, 209, 213, 237- 



Tubular ia, 31. 32, 44, 54, 85 — 9, 127. 



Tubulariadcg, 89. 



TubularidcB, 90. 



Tnhularina, 90. 



Tubulosa, 159, 162, 204, 206, 237, 242, 



243- 

 Turbinaria, 241. 

 Turbhiolia^ 247. 

 TurbinolidcB, 202, 207, 233, 234, 237, 



246, 247. 

 Turris, 02. 

 Turritopsis, 61. 

 Type, of Hydrozoa, 20; of Actinozoa, 



131. 



Ulocyathus, 232. 



Ulophyllia. 239. 



Umbellu I aria, 235. 



Umbrella, of Lucerrmridce, 27, 37,47, 



124. 

 Urtitating organs, of Calenterata, 3. 



Varnolation, of tissues, 8, 32. 

 Vegetative repetition, 73. 

 Veil, of nectocalyx, 36, 116. 

 Velella, form and structure of, 104 ; 



development of, 59 ; pneumatocyst 

 of, 102, 105 ; tentacles of, 32, ill ; 

 polypites of, 105, no, 114; gono- 

 phores of, 45, 112 — 3; glandular sacs 

 of, 106 ; distribution of, 127. 



Velellidce, 114, 



Verefillut?i, 212. 



Vesicles, of Medusidts, 37. 



Villi, of polypite, 31. 



Virgularia, 212, 241. 



Vital endowments, of lower animals, 

 10. 



Vitelline membrane, 15. 



Vogtia, 45, 99. 



Vorticlava, 82, 85—7, 89. 



Warts, of Sea-anemones, 149. 

 Willsia, canals of, 116. 



Yolk, 14. 



Yolk-division, 15, 51, 170. 



Yolk-sac, 15. 



Znphrentis, 214, 238 



Zoantharia, general characters of, 

 139, 169, 196; polypes of, 131, 14', 

 197; tentacles of, 148, 199; threari- 

 cells of. 150; corallum of, 158—62, 

 173, 186, 201—5 j free-swimming 

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

 development of, 170 ; distribution 

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

 242. 



Zoanth'/dce, 162, 199, 201, 206. 



Zoanthus, 160, 235. 



Zooids, 74. 



THE END, 



