INDEX-GLOSSARY. 401 



Testis (1) The Spermary, q.r.- (2) the posterior half of a divided optic 



lobe, 302. 

 Tetradactyle (<ricnrap<f, r&rpet-, four; ^rix.Tv\ti, a finger) With four digits, 



176. 

 Thalamencephalon The axial part of the fore-brain, containing the 3rd 



ventricle, the side-walls of which are formed by the optic thalami. 



See Fore-brain. 

 Thalamus, Optic A mass of grey matter in the thalamencephalon, forming 



either side-wall of the 3rd ventricle, 210, 252. 

 Thigh (Femur), 176. 



Thorax (0/>g, the chest), the chest, 83, 86, 269. 

 Thumb (Pollex), 176, 230, 281, 338. 

 Thyrohyals The posterior cornua of the hyoid, 183. 

 Tissue An aggregate of similar cells adapted for the performance of some 



special function, 20; Connective t., 29, 188 ; Botryoidal, 29. 

 Tongue, 160, 189, 194, 242, 284, 329. 



Tonsil A thickening of the free edge of the soft palate, 284. 

 Tooth, of Crayfish, 93 ; Helix, 126 ; Scyllium, 160 ; Rana, 182, 189, 193 ; 



Lepus, 284 ; Homo, 329. 

 Touch Lumbricus, 66. See Tactile Organs. 

 Touch corpuscles, 178. 



Trachea (r^y,-, r^^s7a, rough) The windpipe, 248, 293. 

 Transverse process, 158. 

 Tragulidae, 355. 

 Tracts, Optic The posterior limbs of the X-shaped optic chiasma, 169, 



211, 253, 302. 

 Tree, Bronchial, 343. 

 Trichina, 54. 



Tridactyle (TP<HS, T?I-, three; SaKTuXos, a finger) With three digits, 230. 

 Triploblastica (-rpiTrXous, triple; /SXao-ros, a germ), 340. 

 Trochanter, 241, 282. 

 Trochlea (trochlea, a set of blocks and pulleys ; <rpo%f, a wheel) The 



pulley-like articular surface on the distal end of the humerus, 239, 



280. 



Troglodytes, 338. 

 Truncus arteriosus, in the Frog The tubular part of the heart which 



succeeds the ventricle, and from which the arterial arches take origin, 



195, 203. 

 Trunk, 

 Tube Eustachian, 189, 219, 233, 255, 274; Fallopian, 299, 334; Neural, 



151, 224, 261. 

 Tubercle, of rib, 237, 279. 



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