280 S A U R I A. 



Dactyloperus insulensis, Grd. 



Char. spec. — jSqumnis notaeis quam lateralihus 7ninoribus. Capife 

 caudaque supra granulatis. Scutis mentaUhus quatuor in seriem 

 transversalem appositis. Supra fusco-cinereo, minimis punctis nigris 

 notato ; infra alhescente. 



Spec. Char. — Scales along the middle region of the back smaller than 

 on the sides. Upper surface of the head and tail granular. Four 

 mental shields, placed side by side. Greyish-brown above, minutely 

 speckled with black ; whitish beneath. 



Stn. — Dactyloperus insulensis, Grd, in Proc. Acad. Nat. Sci. Philad. November, 

 1867. 



Descr. — In a specimen three inches and a half in total length, the 

 tail measures an inch and a half. The rostral plate is subpentagonal ; 

 the nostril perforates a small plate situated sideways, in contiguity 

 with the rostral. There are two small internaso-rostral plates. The 

 upper surface and sides of the head being covered with granular 

 scales, of somewhat coarser appearance upon the fronto-nasal region, 

 than on the frontal and occipital regions. The orbit is circular and 

 rather large ; its diameter entering once and a half over the distance 

 between its anterior rim and the extremity of the muzzle or snout. 

 The auricular aperture is rather moderate, and distant from the orbit 

 by one of its diameter. The subgular scales are quite small, whilst 

 the mental shields are considerably developed. The middle pair is 

 very large and elongated, narrowest posteriorly, contiguous anteriorly 

 to the symphyseal and first labials. The adjacent pair is smaller than 

 the former, and, like it, contiguous to the labials. A few small plates 

 may be observed between the outer pair of mental shields and the 

 parallel labials. 



The upper region of the body is covered with small subcircular 

 scales, a good deal smaller along the middle line of the back than on 

 the sides ; thpse protecting the abdomen are larger yet, and have a 

 much smoother appearance. The inferior surface of the thighs, in the 

 male, exhibit a continuous series of pores, about twenty in number, on 

 either side. The upper surface of the tail is covered with granular 



