24 CALIFORNIA ACADEMY OF SCIENCES. 



Gulars. — Scales on throat. 



Humerals. — The second pair of plastral plates. 



Imbricate. — Lapped, as shingles. 



Inferior. — Lower. 



Infralabials. — Plates on the lower lip. 



Inguinals. — Plates on the posterior surface of the bridge 

 of turtles. 



Internusals. — Scales on the top of the snout just behind 

 the rostral plate. 



Interparietal. — 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 on an over- 

 turned boat. 



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



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



Loral. — See loreal. 



Lorcal. — 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. 



Nuchal plate. — The unpaired marginal plate of turtles 

 on the median line at the front of the carapace. 



Occipitals. — Plates behind the parietals. Sometimes ap- 

 plied to the parietals. 



Parietals. — In most snakes, the largest and last plates 

 on top of the head; in lizards, plates at the side of 

 the interparietal and behind the frontoparietals. 



Pectoral plates. — The third pair of plastral plates. 



Plastral. — Pertaining to the plastron. 



Plastron. — The lower portion of the shell of turtles. 



Postabdominal. — Anal plate. 



