8 4 4 



INDEX. 



Sula, 604. 



Sun-bear, 740. 



Sun-birds, 627. 



Surf-duck, 606. 



Surinam Toad, 521. 



Sus, 705, 706. 



Swallow, 628, 629. 



Swan, 605, 606. 



Swifts, 583, 628, 629. 



Swim-bladder of Fishes, 475. 



Swimmerets of Lobster, 279, 309. 



Swimming-bells, 132. 



Sycandra, 84, 85. 



Sycon, 88. 



Syllidea, 260. 



Syllis, 269. 



Sylviadce, 626, 627. 



Symborodon, 699. 



Sympodium, 167. 



Synapticulse, 161. 



Synaptidce., 219, 222. 



Syndactyli, 629. 



Syndendrium, 142. 



Syngnathidce, 488. 



Syringoporidce, 185. 



Syrinx, 255. 



Syrinx, 591. 



Tabanidce, 355. 



Tabulse of Corals, 161, 162. 



Tabulata, 164. 



Tabulate Corals, 164. 



Tachyglossus, 657, 658. 



Tachypetes, 604. 



Tadpole, 520. 



Tcenia, 230, 231, 233, 234, 235, 236. 



Tceniada, 229 ; characters and develop- 

 ment of, 230 et seq. 



Talitrus, 304. 



Talpa, 766, 767. 



Talpidce, 766, 771. 



Tamandua, 677. 



Tamias, 760. 



Tanagridce, 626. 



Tanais, 303, 305. 



Tank-worms, 246. 



Tantalince, 611. 



Tape-worm (see Tcenia). 



Tapir, 698. 



Tapiridce, 697, 721. 



Tapirus, 693, 696, 697, 698, 722. 



Tardigrada, 319, 320. 



Tarsiidce, 774. 



Tarsius, 774. 



Taxidea, 742. 



Teal, 604. 



Tectibranchiata, 412. 



Teqenaria, 316, 317. 



Teleodactyla, 694. 



Teleosaurus, 558. 



Teleostei, characters of, 482 e se^. ; sub- 

 divisions of, 485 et seg. ; distribution 

 of, in time, 507. 



Telephorus, 362. 



Telerpeton, 554. 



Tellinidce., 404. 



Telmatornis, 612. 



Telson, of Crustacea, 276; of Lobster, 

 279 ; of Limulus, 300, 301 ; of Scorpion, 

 324. 



Tenebrionidce, 362. 



Teurec, 769. 



Tentacles, of Hydra, 112, 113 ; of Tubula- 



ria, 120; of Calycophoridce, 132; of 



Physophoridce, 134 ; of Medusidoe, 129 ; 



of Hydra-tuba, 139 ; of Actinia, 155 ; of 



Alcyonaria, 165; of Pleurobrachia, 177 ; 



of Holothuroidea, 220 ; of Polyzoa, 375 ; 



of Tunicata, 381 ; of Cuttle-fishes, 419, 



428. 



Tentaculites, 271, 418. 

 Tenthredinidce, 357. 

 Tenthredo, 358. 

 Tenuirostres, 624, 627. 

 Terebella, 265. 266. 

 Terebratula, 391. 

 Terebratulidce, 394, 395. 

 Terbratulina, 392, 393. 

 Teredo, 404. 

 Tergum, of the exoskeleton of Crustacea, 



279; of Arachnida, 315. 

 Tern, 603. 

 Terricola, 262. 



Termites, 343; communities of, 351. 

 Terrapin, 535, 536 

 Test, of Foraminifera, 66, 68 ; of c/<i- 



noidea, 193 ; of Tunicata, 381. 

 Testacella, 369. 

 Testudinidce, 536. 

 Teatudo, 536. 

 Tetrabranchiata (Cephalopoda), 426; char- 



acters of, 430; divisions of, 433 ; distri- 



bution of, in time, 435. 

 Tetradecapoda, 303. 

 Tetramera, 362. 

 Tetranychus, 321. 

 Tetrao, 614. 

 Tetraonidce, 614. 

 Tetrastemma, 242. 

 Teuthidce, 429, 437. 

 Textularidea, 74. 

 Thalamophora, 65, 72. 

 Thalassarachna, 322. 

 Thalassarctos, 740. 

 Thalassicolla, 81. 

 Thalassicollida, 77, 81. 

 Thalassolampe, 81. 

 Thaumantias, 128. 



Theca of sclerodermie corallum, 160. 

 Thecaphora, 121, 126. 

 Thecidiidce, 394. 3P5. 

 Thecomedusce, 127. 

 Thecosomata, 417. 

 Thelyphonidce, 325 

 Thelyphonus, 323, 325. 

 Theridion, 326. 

 Theriodontia, 530, 567. 

 Theriomorpha (see 

 Thomomys, 757. 

 Thoracica (Cirripedia), 291. 

 Thoracipodn, 302. 

 Thornback, 499. 

 Thornheaded Worms, 242. 

 Thorny Clams, 404. 

 Thread-cells, 107, 108. 

 Thread-worms, 244, 246. 

 T/wips, 348, 349. 

 Thrushes, 627. 

 Thylacinus, 670. 

 Thylacoleo, 670. 

 Thy one, 221. 

 Thysanoptera, 349. 

 Thysanura, 347, 348. 



