278 SAURIA. 



six times and a half. It must be an animal of very delicate texture, 

 for it appears to be of difficult preservation. 



The dorsal scales are smaller along the dorsal line than on the 

 sides of the body. The rostral plate is low, subhexagonal, the nos- 

 trils being situated laterally, immediately behind the upper angles of 

 the rostral plate. There are a few internasal, very small, plates ; the 

 fronto-nasal region exhibits somewhat larger, granular scales, than 

 the occipital region, where they are as small as on the middle line of 

 the back. The subgular scales are very small also. The mental 

 region, properly so called, is covered with rather large, polygonal 

 plates, disposed in pairs upon the mesial line. On the tail, the scales 

 are arranged upon circular series ; they are larger than on the back 

 and sides ; beneath that organ, they assume the same arrangement, 

 and are likewise larger than on the abdomen. 



The ground color of the upper regions is grey, with small, brown, 

 irregularly dispersed spots. The inferior regions are whitish, uni- 

 color. 



LOG. Balabac Passage, Philippine Archipelago. 



2. PEROPUS NEGLECTUS, Grd. 



CHAB. SPEC. Oculis magnis. Scutis mentalibus parvis, polyrjonalibus. 

 Cauda a latere serrata. /Supra fusco, nigro notato; infra unicolori, 



SPEC. CHAR. Eyes large. Mental shields small, and polygonal. Tail 

 laterally serrated. Above brown, with black markings. Beneath 

 unicolor. 



SYN. Peropus neglectus, GRD. in Proc. Acad. Nat. Sci. Philad. November, 1857. 



OBSERV. A single specimen of this species was collected. Its state 

 of keeping will not permit a full description to be drawn. Compared 

 to the preceding species, the eye is much larger, and the tail more 

 conspicuously serrated laterally. The granulation of the upper 

 regions, and the scales of the inferior regions, are larger than in P. 

 mulilatus. 



