GERRHOSAURUS B1BRONI. — Smith. 



Reptilia.— Plate XXXVIII. Fig. 1. (Male.) 



G. superne rubro-brunneus, lineis duabus sublatis et duabus angustis variegatis, his ad basin caudse, 

 illis versus apicem desinentibus ; mento, gula, capitis lateribus, guttere, extremitatibusque anterioribus 

 interne minatis ; pectore abdomineque griseo-albis ; scuto occipitale rhombica. 



Longitudo e naso ad basin caudse 4 unc. 6 lin. ; caudas 6 unc. 



Colour. — The upper surface of the head chesnut-brown ; the sides and 

 under surface of the head and the throat anteriorly vermillion-red ; the back, 

 the sides of the body, the upper parts of the tail, and the outer surface of the 

 extremities intermediate between brownish red and deep orange coloured 

 brown. The back is variegated with four yellow lines and the tail with two, 

 which are the continuations of the two external lines of the back, and which 

 commence above and over the eyes. These lines are wider than the other two 

 which extend along the middle of the back, have a greenish tinge, and are 

 very narrow and slightly broken ; the latter commence at the hind-head and 

 terminate at the base of the tail, and become less distinct as they recede from 

 the head. The throat posteriorly, the breast, belly, under surface of tail and 

 inner surface of extremities greyish white, the colour on the fore legs tinted 

 with vermillion-red. Eyes deep chesnut-brown. 



Form, &c. — Figure moderately slender and fusiform ; tail tapered to a 

 point. Head quadrangular and tapered towards the nose, which is obtusely 

 pointed. Body and base of tail quadrangular, the angles rounded, and the 

 back and sides, but especially the latter slightly convex ; tail towards the 

 point cylindrical ; internasal plate large, triangular, and diamond shaped. 

 Naso-rostral plates small roundish, and the nostrils towards their lower 

 margin. Fronto-parietal plates five-sided, sides unequal; parietal plates 

 three-sided, the inner side arched with a small diamond shaped occipital 

 plate situated partly between them and partly between the inner and hinder 

 angles of the fronto-parietal. Palpebral plates four, the two middle ones the 

 largest, and the whole margined externally by a row of narrow oblong plates 

 which form the upper edge of the orbit. Temporal plates small, subcircular, 

 and placed like stones in a pavement ; scales of upper lip six, exclusive of 

 the rostral plate, the fourth, reckoning from before backwards, the longest ; 

 Meatus extemus small and vertical, broadest below, and anteriorly edged with 

 a slightly projecting scaly plate. Lateral duplicature of skin, which extends 



