APPENDIX F.— REPTILES. 211 



Stn. — Cnemidophorus ctularis,~B. & G. Proc. Acad. Nat. Sci. Philad., 

 vi, 1852, 128. 



Desc. — This species is very closely allied to C sezlineatns, having, like 

 the latter, six longitudinal stripes, three on each side of the body, run- 

 ning from head to some distance along the tail. It has, also, the same 

 general form ; but on a close comparison it will soon be observed that 

 the body is proportionally shorter, the limbs more developed, whilst the 

 scales on the back appear to be actually larger. The head is propor- 

 tionally smaller and narrower. But the most striking organic character 

 consists in the presence of somewhat large and conspicuous scales on 

 the margin of the subguttural fold of the skin. The following indica- 

 tions of color are derived from the notes of the Expedition : The upper 

 surface of the head is reddish brown ; three longitudinal yellow or 

 greenish stripes extending from the head to the origin of the tail ; the 

 middle stripe on each side may be followed on the tail to a considerable 

 distance. The dorsal space between the two uppermost stripes on each 

 side is brown, or reddish brown, like the head above. The space be- 

 tween the uppermost and middle stripes is of a deep black, and extends 

 from the upper angle of the orbit down to a certain distance along the 

 tail. The space between the middle and lower stripes, and between the 

 latter and the abdominal scutellse, is green, or greenish brown. The 

 legs are brownish red, and the belly white or bluish white. The tail 

 underneath is yellowish red ; above, brownish, or reddish brown. 



Specimens were collected on the 5 th and 6 th of June. 



Plate X, fig. 1, represents Cnemidophorus gularis of natural size. 



Fig. 2. Head seen from above, to exhibit the plates. 



Fig. 3 shows the scales on the subguttural fold and the hand from 

 beneath, as well as the submaxillary plates. 



Fig. 4 represents the femoral pores, the preanal plates, and also the 

 plates at the inferior surface of the hind legs, and the lower surface of 

 the feet. 



VI. LYGOSOMA, Gray. 



This genus includes small scincoid lizards, the nostrils of which open 

 in one single plate, the nasal. The supranasals are wanting. The palate 

 is without teeth, and provided with a triangular notch situated far back. 

 The scales, broader than long, are all smooth. 



All the species of Lygosoma belong to the Old World, except the one 

 here mentioned. 



