GLOSSARY 45 



Frontal. The large plate or plates on top of the head be- 

 tween the supraoculars. Sometimes applied to the pre- 



frontals. 

 Fronto'parietal. 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. 

 Gastrostiga. See gastrosteges. 

 Centals. Large scales behind the mental of many snakes, 



often in two pairs anterior and posterior. 

 Gular fold. Transverse fold of skin of throat. 

 Gular flate. The first pair of plastral plates. 

 Gulars. Scales on throat. 

 Humerals. The second pair of plastral plates. 

 Imbricate. Lapped, like shingles. 

 Inferior. Lower. 



Infralabials. Plates on the lower lip. 

 Inguinal. Plates on the posterior surface of the bridge of 



turtles. 

 Inter nasals. Scales on top of the snout just behind the 



rostral plate. 

 Inter^arietal. A plate on top of the head (of lizards) 



between the parietals and usually containing the pineal 



spot. 



Juxtaposed. Placed side by side, not imbricate. 

 Keel. A ridge along a scale like the keel of an overturned 



boat. 



Labials. Plates on the lips; specially, on the upper lip. 

 Laterals. Scales on the sides; the costals of turtles. 

 Loral. See loreal. 



Loreal. In the space between the preoculars and nasals. 

 Maculate. Marked. 



Marginals. The plates around the edge of the carapace. 

 Mental. Same as symphyseal, but usually of snakes. 

 Mucronate. Provided with a point or spine. 



