GLOSSARY. 



TIBIA (Lat., a flute). The shin-bone; the inner of 

 the two bones of the lower leg, or lower part of the hind- 

 limb in quadrupeds. It corresponds to the radius in the 

 arm or fore-limb. See fig. 7. 



TINE. A spike or prong; specially applied to a 

 spiked branch of the antlers of a deer. 



TRAGUS (Gr. tragos, a goat). The cartilaginous 

 valve-like flap which extends from the front backwards 

 over the entrance to the ear-passage: so called probably 

 from the fact of its being 

 provided in some persons 

 with a tuft of hairs like a 

 goat's beard. 



TROCHANTER (Gr. 

 tredw, to turn). A knob 

 or process at or near the 

 upper end of the thigh- 

 bone for the attachment 

 of muscles concerned in 

 rotating the limb. — Third 

 trochanter, a lateral tro- 

 chanter near the upper 

 end of the thigh-bone char- 

 acteristic of the Perisso- 

 dactyla. 



T U B E R C L E D 

 TOOTH. A tooth the surface of which is provided 

 with small blunt knobs or tubercles; especially, one of 

 the molars in the Carnivora behind the carnassials. 



ULN.'K (Lat., the elbow). The outer of the two bones 

 of the forearm when the palm of the hand is laid flat, or 

 the corresponding bone in the fore-limb of one of the 

 lower animals. It answers to i\\Q fibula in the hind-limb. 

 See figs. 1 7 and 34. 



UNDIFFERENTIATED. Not characterized by a 

 special structure; for example, the simple and uniform 

 teeth of the dolphin. 



UNGUICUL.A.TE (Lat. unguis, a nail). Furnished 

 with nails or claws. 



Fig. 39. — The Cranium, iia. Nasal ; 

 /r. Frontal : pa. Parietal : o. Occipital ; 

 /. Temporal : /. Jugal, malar, or cheek 

 bone ; c.p. Coronoid process : z,a. Zygo- 

 matic arch; s.s. Line of sagittal suture; 

 l.s. Lambdoidal suture. 



Furnished with 



UNGULATE (Ut. ungula, a hooO 

 hoofs. 



UTERUS (Lat.). The womb. 



VASCULAR (Lat. Tas, a vessel). Connected with or 

 belonging to the system of blood-vessels, or the circula- 

 tory system. 



VELVET. In a special sense, the delicate hairy 

 covering of a deer's antlers while growing. 



VER TEBRA (I^t. verto, to turn). One of the bones 

 of the column inclosing the 

 spinal cord. See fig. 40. 



VISCERA (Lat. pi. of 

 visais). The contents of the 

 great cavities of the body, 

 especially of the chest and 

 abdomen. Thus the heart, 

 liver, stomach, &c., are all 

 viscera, and one of them 

 separately is a viscus. 



WITHERS. The eleva- 

 tion at the junction of the 

 shoulder-bones of a horse. 



WRIST. The part of the 

 arm where the hand is jointed 

 to the forearm; sometimes 

 used in the body of the book in a wider sense to designate 

 also the corresponding part in the fore-limb of one of the 

 lower animals; the carpus. 



ZONARY (Gr. zoi r, Lat. zona, a belt). Having the 

 form of a belt or ring. 



ZYGODONT (Gr. zygon, a yoke, and odons, odontos, a 

 tooth). A term applied to teeth divided into transverse 

 ridges by means of deep grooves, as in the tapir. 



ZYGOMATIC ARCH (Gr. zygoma, from zygon, a 

 yoke). The arch of bone in the skull formed by the 

 meeting of a backward process from the jugal or cheek 

 bone and a forward jjrocess from the temporal bone. 

 In some forms this arch is incomplete. See figs. 31, 33, 

 36, and 39, and comp. figs. 18 and 19. 



Fig. 40. — Dorsal Vertebra seen from 

 above. <. Centrum or body of the 

 vertebra; s.c. Spinal or neural canal ; 

 n.s. Neural spine, the whole series of 

 which in the vertebral column forms 

 the uneven ridge on the back; /./. 

 Transverse processes articulating with 

 the ribs. 



Vol. II. 



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