189 



CoRACOiD. The bone or cartilage that forms the portion of the shoulder 



girdle in front of the glenoid cavity. 

 Costal. Pertaining to the ribs. The costnl furrows, or grooves, of 



Urodeles run across the body between the fore and the hind legs. 



For costal scutes of tortoises, see figure 11. 

 Crown-shields. The large plates which cover the upper surface of 



snakes' heads. See figure 9. 



Dentary. The anterior bone of the lower jaw, the one usually bearing 



the teeth. 

 Dermal folds. The thickened ridges of skin on the backs of some 



frogs; the glandular folds. 

 DiAPOPHYsis. The transverse process of a vertebra ; here used of that 



of the sacral vertebra. 



Entoplastron. One of the bones of the plastron of a tortoise. 



Emarginate. Furnished with an obtuse notch. 



Emargination. a broad, shallow notch. 



Epidermal. Belonging to the outer layer of the skin. 



Ethmoid. A bone or cartilage between and often surrounding the nasal 



sacs. 

 Eustachian tube. A passage from the tympanic cavity to the pharynx. 

 ExTRALiMiTAL. Outsidc of the limits fmmediately adjoining Indiana. 



Femoral. Pertaining to the thighs; femoral pores are found on the 

 under side of the thighs of some lizards. 



Frontals. Plates of the heads of snakes. See figure 9. 



Fontanelle. a space filled with membrane between bones that ap- 

 proach one another without meeting. 



GuLAR. Pertaining to the throat; gular fold, a fold of skin across the 

 throat; gular scute (of tortoises), see figure 12. 



Holders. Organs of adhesion at the corners of the mouth of a tadpole. 

 Humerals. Scutes of the plastron of a tortoise; see figure 12. 



Inframarginals. Scutes of some tortoises lying below the marginals. 

 Inguinal. Pertaining to the groin. 



Keel. A well defined ridge. Keeled, furnished with a sharp ridge. 



Labial. Pertaining to the lips. Labial plates (of snakes), see figure 9. 

 Larva. The undeveloped young of some animals, as the caterpillar of 



an insect or the tadpole of a frog. 

 Loral. Pertaining to the space in front of the eye ; see anteorbital, 



also figure 9. 



Marginals. See figure 11. 



