INDEX. 



705 



Trematis, 317. x y_ J>>^ 



r rematoda, 183; general characters of, 



189, 190; development of, 190; habitat 



of, 191. 

 "inoctopus, 357. 



.-iurthra, 201. 



ichecidce, 606. 



,-ichecus, 606, 607. 



richina, 195. 



richocysts, 8'2. 



richoglossus, 521. 



"ichoptera, 281. 



'iconodon, 639, 641. 



'ridacna, 328. 

 Tridacnicke, 327, 328. 

 Trigonia (Mollusca).32~; (Mammalia') , 641. 

 Triaoniadw, 326, 327. 

 Trilobita, 238 ; structure of the crust of, 



239 ; distribution of, in time, 253. 

 Trimera, 292. 

 Trimerella, 317. 

 TrimerdlidiK, 317. 

 Trmffidce, 510. 

 Trionycidce, 449, 452, 453. 

 Trionyx, 452. 



2Vttow, (Mollusca), 339 ; (Amphibia), 438. 

 Tritonia, 341. 

 Tritoniadce, 336, 341. 

 Trociiilidce, 526. 

 Trochoceras, 356, 358. 



Trochocystites, 182. 



Trochoid shell, of Foraminifera, 62 ; of 

 Gasteropoda, 333. 



Trochus, 340. 



Troglodytes, 526, 637. 

 Trogon, 522. 



Trogonidai, 520, 522. 



Trogontherium, 648. 



Trombididd', 260. 



Trophi, of Insects, 270. 



Trophosome, 90. 



Truncated Shells, 297. 



Trygon, 423. 



Tube-feet, of Echinus, 160; of Asteroidea, 

 165 ; of Ophiuroidea, 169 ; of Crinoidea, 

 170 ; of Holothuroidea, 178. 



Tubicola, 207 ; characters of, 210 ; de- 

 velopment of, 211 ; distribution of, in 

 time, 216. 



Tubifex, 210, 216. 



TuUporidce, 137, 138, 142. 



Tubularia, 93, 97. 



Tubularida, 93 (see Corynida). 



Tubulosa, 135, 1&2. 



Tunicata, 294, 295 ; characters of, 306 ; 

 respiratory process of, 308 ; circulation 

 of, 309 ; reproduction of, 310 ; homo- 

 logies of, 16. ; divisions of, 311 ; dis- 

 tribution of, in space, 318 ; in time, z&. 



Tunics, of Ascidians, 3i>7. 



Tupaia, 628. 



Turbellaria, 1?3 ; characters of, 191 ; 

 divisions of, 191. 



Turbinated Shells, 333. 



Turbinidffi, 336, 340. 



Turbinolidai, 152. 



Twrfeo, 340. 



Turkey, 516. 



Turrilepas, 253. 



Turrilites, 356, 357, 358, 361. 



Turrildla, 340. 



Turritellidcc, 330, 34Q. 



parties, 44S, 452, 453. 

 Ti/lcnchus, 197. 

 Tylodina, 341. 

 Type, morphological, 15. 



, 529. 



Umbilicated shell of Gasteropoda, 334. 

 Umbo, 3-22. 

 Umbrella, 341. 



Umbrella of Lucernarida, 114, 118. 

 Ungulata, 541, 551, 553; characters of, 



580 ; divisions of, 581 ; distribution of, 



in time, 644. 

 LTnio, 327. 

 Unionidce, 326, 327. 

 Univalve Shells, 296, 329, 333. 

 Upupidce, 526. 

 PYia, 503. 

 Uraster, 182. 

 Urnatella, 303. 



Urodela, 432 ; characters of, 435. 

 t/rsz'dre, 608. 

 ^w, 608, 609, 648. 

 Urus,646. 



VACUOLES, of Protozoa, 55 ; of Infusoria, 



77. 



Vaginicola, 82. 

 Vaginulus, 341. 

 Valkeria, 303. 

 I'aiuata, 340, 359. 

 Vampire-bat. 6i>5. 

 Vanellus, 511. 

 Farawtdj, 464. 

 Varanus, 464. 

 Veil, of Gonophores, 95 ; of nectocalycesr, 



105 ; of naked-eyed Medusae, 111. 

 FeZeMa, 107, 108, 109. 

 Velellidce, 110. 

 Fenenosa (Ophidia), 458. 

 Veneridw, 327, 328 ; distribution of, in 



time, 359. 

 Venerupis, 328. 

 s, 75. 



Venus's girdle, 146. 



Vermts, 155. 



Vermetus, 333, 340. 



Verrucidre, 226, 233; distribution of, in 



time, 253. 

 Verruca, 231. 



Vertebra, structure of, 337. 

 Vertebrata, 369 ; general characters of, 



ib., et seq. ; skeleton of, 373, et seq. ; 



digestive system of, 378 ; blood of, 380 ; 



respiratory system of, 381 ; nervous 



system of, 382 ; reproduction of, 883 ; 



development of, ib.; divisions of, ib.etseq. 

 Vesicle, contractile, of, Protozoa, 49 ; of 



A mosba, 55 ; of Paramaxium, 78 ; of 



Epistylis, 81. 



Vesicles, of Medusa;, 111, 114. 

 Vespidte, 288. 

 Vespertilio, 625. 

 Vesper tilionida;, 624. 

 Vibracula, 302. 

 Vibrios, 37, 197. 

 Vidua, 524, 525. 

 Viperina, 457. 

 Virgularia, 138. 

 Visceral arches, of the embryo of Verte- 



brates, 372. 



2 Y 



