INDEX — GLOSSARY 



447 



Temporal bone, in the cat, 525. 

 Tentacles, ocular, 252, 253, 258; of 



brachiopods, 182, 184 ; of cephalopods, 



232, 253, 255; of gastropods, 237; 



of holothurians, 172; of Hydrozoa, 



108, lOQ, no. 

 Tentaculites, 244, 248-249 ; T. gyra- 



canthus, 24Q. 

 Terebratella plicata, 189, 202. 

 Terebratula, 202; T. harlani, 202, 202; 



forms like, 202. 

 Terebratulids, 192. 

 Terebrdtiilina coreanica, 203 ; T. sep- 



tentrionalis, 181-187, 182, 185, 202; 



blood of, 185 ; cardinal process of, 



182, 183; circulation of blood, 185; 



digestion of, 185; embryo of, 186; 



excretion of waste, 185, 186; fertili- 

 ■ zationof, 186 ; food of, 184 ; geographic 



range of, 181; mantles of, 184; 



muscles of, 182, 183, 183; nervous 



system of, 186; protection of, 181; 



protegulum of, 187 ; respiration of, 



186; sexes in, 1S6; skeleton of, 181; 



soft body of, 182, 184, 183; valves of, 



181, 182. 

 Teredo, 222, 233-234; T. navalis, 233, 



233; burrow of, 17; siphons of, 233, 



233- 



Teretrum primulum, 31Q. 



Tern, compared to Ichthyornis, 372 ; skull 

 and brain of, 372. 



Tertiary, 407. 



Tertiary fossils figured, 71, 74; see also 

 Eocene, Oligocene, Miocene, and 

 Pliocene. 



Test, the name applied to the skeleton, 

 where, as in sea urchins and protozoons, 

 it is internal or is secreted by the whole 

 surface of the body. The skeleton is 

 called a shell when it is secreted by a 

 mantle, as in brachiopods. 



Tetrabranchiata, 260-268 ; food of 

 fossil, 261 ; protoconch of, 261 ; reca- 

 pitulation in, 261 ; subdivision of, 261. 



Tetracoralla, 131-133. 



Tetractinellida, 97, 98, 105. 



Tetraseptata, 131. 



Textularia, 90. 



Thallophyta, 32-42, 43 ; classification 

 of, 32 ; geologic range of, 408. 



Thallophytes, the Thallophyta. 



Theca, 128. 



Thermal algae, 39. 



Theromorpha, 355-356; see Anomo- 



dontia. 

 Theromorphs, see Theromorpha. 

 Theropoda, 359-360. 

 Thoatheriiim, 389. 

 Thoracic, see dorsal. 

 Thoracic shield in trilobites, 291. 

 Thora.x of trilobites, 286, 287. 

 Thread-worms, 1 40-141 ; fossil, 140, 



141. 

 Thumb, see under phalanges and digits; 



of the cat, 327. 

 Thunderbolt, 272. 

 Thunder stones, 272. 

 Thysanodictyon, 105. 

 Thysanoptera, 318. 

 Tibia, of cat, 323, 328 ; of mammals, 383. 



394; of reptiles, 360, 362, 366, 367. 

 Tibio-tarsals, of birds, 372. 

 Ticks, 316; as disease carriers, 376. 

 Tiger, saber-tooth, 381, 383; in North 



America, 375. 

 Tillodontia, 381-382. 

 Time scale, geologic, 407. 

 Titanotheres, 380, 391, 392. 

 Toads, 353 ; see Anura. 

 Toadstools, 40. 

 Toes, see phalanges. 

 Tongue, 330. 

 Tooth structure, in the extinction of the 



species, 374. 

 Tortoises, 366 ; see Chelonia. 

 Touch, sense of {see also sense organs 



under the various classes), in A pus, 



301 ; in crustaceans, 282, 301 ; in 



gastropods, 242 ; in mammals, 335 ; 



in trilobites, 289. 

 Toxodon, 389. 

 Toxodontia, 389. 

 Trachea, respiratory tubes, evolution of, 



310; in mammals, 330, 333. 

 Tracheata, 275. 

 Trachodon, 359, 363. 

 Trachylinae, I2i. 

 Tracks, 16. 

 Trails, 16. 

 Transverse processes of vertebrae of the 



cat, 323, 326. 

 Trapezium of the cat, 327. 

 Trapezoid of the cat, 327. 



