Griffin: South American Lizards. 305 



from the posterior margin of the eye. A well -developed spine projects 

 from the middle of the supraciliary edge of the male specimens; it is 

 not developed in the female. Mental very large, obtusely angulate 

 behind, in contact with two rather small chin-shields. Two chin- 

 shields only are present, in contact not only with the mental but also 

 with the first lower labials. The scales back of the chin-shields di- 

 minish in size slightly toward the throat. The upper surface and sides 

 of the body and the upper and lower surfaces of the fore limbs are 

 covered by leather large, high, conical, pointed, granular scales, which 

 are slightly smaller on the head than on the body. They are not 

 larger on the snout than on the body, but are there more closely set, and 

 somewhat imbricate. The scales of the abdomen and of the lower 

 surfaces of the hind limbs are large, flat, hexagonal, and imbricate. 

 The tail is cylindrical, tapering, covered on the dorsal and lateral 

 surfaces by closely set, pointed, imbricate scales. The scales of the 

 center of the lower surface of the tail are like those of the abdomen; 

 there is a gradual transition from these to those of the sides of the tail. 

 Only on the tail of the female specimen is there a central row of much 

 enlarged scales. On this, the scales of the base and tip of the tail 

 are as described, while those of the middle are broader, but only a 

 few are broader than long, and some are twice as broad as long. 



Coloring of the Male {in Alcohol) C. M. No. 1040: head and body 

 dark brown above, light beneath, the color of the lower part of the 

 side gradually fading to that of the ventral surface. A narrow light 

 stripe on each side of the back, passing through the eye, to the base 

 of the tail. Small light spots, covering five to eight scales, are arranged 

 in about fourteen pairs in the dark dorsal band between the head and 

 the base of the tail. A single row of conspicuous light spots lies near 

 the top of the dark lateral band; others less conspicuous and regular 

 are below these. The upper surface and sides of the head are irre- 

 gularly mottled with brown and white. The tail is marked with 

 alternate light and dark rings. The dark rings are much wider, 

 darker, and more conspicuous on the lower than on the upper surface 

 of the tail, except near the tip, where they are longer and alike on 

 both surfaces. The upper sides of the limbs are spotted with brown 

 on a light ground. 



C. M. No. 1041: the dark bands of the body are much less distinct 

 in this specimen, in its faded condition only a number of dark dorsal 

 and lateral spots being conspicuous. Sufiicient traces of the rest of 



