CROCODILIANS, LIZARDS, AND SNAKES. 295 



are largest. The plates on the side of the chiu (one row anteriorly, three 

 behind), margining the lower labials are hexagonal, paved, and much 

 larger thau the intervening ones, as are also those on the temples. 

 There are two transverse folds on the throat, the covered portions of 

 which are lined with smaller scales, the narrow space between the two 

 being covered with large rhomboidal scales like those on the breast. 

 The scales between the fore legs are perhaps larger than those on the 

 belly ; those covering the shoulder considerably so. All the scales on the 

 body are arranged in quincunx, except on the belly and beneath the 

 tail, where they are in transverse series of small, nearly square, alter- 

 nating plates. The scales on the under and inner surface of the hind 

 leg are larger than elsewhere, especially on the tibia. Those on the 

 shoulder and inside of forearm are also large. The male has two plates 

 behind the arms not seen in the female. The femoral pores are distinct. 



In the alcoholic specimen the upper parts are ashy gray. On 

 each side the back is a series of U-shaped blotches, the convexity 

 posterior; sometimes angular or emarginate behind; some 8 or 10 

 pairs from head to above anus. Those blotches anteriorly are some- 

 what obsolete or not filled up; they are bordered behind (sometimes all 

 round) by a light yellowish suffusion or spotting, lighter than the 

 ground color. In some specimens there is a narrow, horizontal, light 

 line from the orbital region above the arms and below the edge of the 

 dorsal blotches fading out on the sides. This sometimes forms the 

 dividing line between another lateral series of blotches corresponding 

 with the dorsal; this series is, however, generally obsolete or else 

 broken up with obscure mottling, the posterior boixler of light suffu- 

 sion or spottings indicating the position of the blotches. The sides 

 occasionally show minute points of whitish. The dorsal blotches are 

 continued in two series on the thickened portion of the tail; the atten- 

 uated portion, however, is usually i)lain gray. The under i^arts are 

 yellowish white. The Jaws with transverse bars of plain bluish, con- 

 tinued obliquely backward on the under surface of the head, which is 

 variously mottled with the same. On each side below and adjacent to 

 the outer edge of the belly are two very distinct indigo-black blotches 

 with a suffusion of bluish around them. These are rather elongated 

 transversely, placed one in advance of the other, and both situated in 

 the posterior extremity of the anterior half of the region from fore to 

 hind legs. They do not extend up the side as far as the lower lateral 

 dusiy blotches. 



In some specimens there is a decided indication of a second light 

 stripe on the side of the neck, continuous with the light edge of the 

 upper jaw and extending, with several interruptions, to the arm. 

 The upper surface of the limbs is transversely banded with dusky. 

 The posterior surface of the thigh is without conspicuous marking. 



The female differs very little, if at all, in color, although possibly the 

 markings above are more obsolete. 



