1865.] DR. J. E. GRAY ON NEW AFRICAN LIZARDS. 641 
cignina in my ‘ Catalogue of the Lizards in the British Museum’ 
(see p. 49), and to the group of the genera of that family which 
have large flat dorsal scales, and five toes to each foot. 
CorRDYLOSAURUS. 
Head depressed, elongate. Occiput covered with a pair of elon- 
gated occipital shields, sometimes united into one; interparietal 
shields absent. Temple covered with several unequal-sized small 
scales. Body depressed, with a very narrow impressed fold occupy- 
ing two-thirds of the hinder part of the sides. Back covered with 
rings of close, square, very obscurely keeled uniform shields, placed 
in longitudinal series. The tail elongate, conical, tapering, with 
rings of strongly keeled, rather elongate scales. The limbs covered 
above with obscurely keeled scales. The belly with four series of 
thin square shields. Toes 5/5, elongate, slender, linear, sharply 
clawed ; femoral pores 4/4 or 5/5, large; subanal pores none. The 
chin and throat covered with hexagonal, thin, smooth scales. The 
underside of the tail with larger, smoother scales. 
CorpDYLOSAURUS TRIVIRGATUS. (Pl. XXXVIII. fig. 2.) 
Whitish (in spirits), with a central broad and a narrow black 
streak on each side, commencing from the end of the nose, and con- 
tinued rather beyond the base of the tail ; limbs brown above ; under- 
side silvery white (in spirits); the frontal nasal shield elongate, 
nearly as long as the frontal. 
Hab. South Africa, Damaraland (Mr. Andersson). 
This Lizard has somewhat the appearance of Platysaurus of Sir 
Andrew Smith; but the back of that Lizard is covered with small 
granular scales. It is also like the Gerrhosaurus subtessellatus of 
Sir Andrew Smith, but differs in the system of coloration and in the 
form of the frontal nasal shield. 
The Lizards of this group may be thus divided :— 
I. The back covered with small granular scales; head depressed, 
elongate ; interparietal and occipital plates similar, square. 
PLATYSAURUS CAPENSIS, A. Smith, Ill. Z. S. A. t. 40. 
PLatysauRus eGuTtatus, A. Smith, App. Ill. Z. S. A. t. 8. 
II. Back covered with smooth, or only slightly keeled, square scales ; 
head elongate, depressed ; interparietal shield none; occipital 
shields elongate, rarely united. 
CoRDYLOSAURUS. 
CoRDYLOSAURUS TRIVIRGATUS, 0. S. 
Frontal nasal elongate. 
CoRDYLOSAURUS SUBTESSELLATUS. 
Frontal nasal transverse. 
Gerrhosaurus subtessellatus, A. Smith, Ill. Z. 8, A. t. 41. f. 1. 
Proc. Zoou. Soc.—1865, No. XLII. 
