REPTILES OF THE I'ACIKIC COAST. 23 



Axitlary. — Plates on the anterior surface of the bridge 



of turtles. 

 Azygous. — Single; not one of a pair. 

 Brachials. — Large scales on the arm. 

 Bridge. — That portion of the shell of a turtle which 



attaches the plastron to the carapace. 

 Canthus rostralis. — A slight continuation of the super- 

 ciliary ridge separating the top from the side of the 



snout. 

 Carapace. — The upper portion of the shell of turtles. 

 Carinate. — Keeled. 

 Chin shields. — See geneials. 

 Cloaca. — A common chamber at the posterior ends of 



the alimentary and urogenital canals. 

 Collar. — Gular fold, especially of Teiidoi. 

 Costals. — The large plates on the sides of the carapace. 

 Dermal. — Pertaining to the skin. 

 Femoral pores. — Glands along the lower surface of the 



thigh. 

 Femorals. — Of turtles, the fifth pair of plastral plates; 



of lizards, plates on the thigh. 

 Frenal — See loreal. 

 Frontal — The large plate or plates on top of the head 



between the supraoculars. Sometimes applied to 



the prefrontals. 

 Frontoparietal. — Plates on top of the head between the 



parietals and the frontal. 

 Gastrosteges . — Large plates along the lower surface of 



the body in most snakes. 

 Oastrostiga. — See gastrosteges. 

 Geneials. — Large scales behind the mental of many 



snakes, often in two pairs — anterior and posterior. 

 Gular fold. — Transverse fold of skin of throat. 

 Gular plates. — The first pair of plastral plates. 



