PTYCHODEIRA GRACILIS. 343 



ing pairs, diminishing in size posteriorly. The scales on the inferior 

 surface of the head are subrhomboid, smooth, and entire upon their 

 posterior margin. The neck is slightly contracted, and slightly 

 wrinkled. The auricular aperture is large, vertically elliptical, pro- 

 vided with very small scales upon its anterior margin. 



The body is slender and depressed. The limbs are slender also : 

 the anterior, when stretched backwards alongside the body, overlap 

 the two-thirds of the distance to the groins, whilst the posterior ones, 

 when similarly brought forwards, will extend their longest toe beyond 

 the shoulder. The tail is long and very slender, subconical, and 

 tapering into a point, being more than twice the length of the body. 



The dorsal scales are well developed, larger posteriorly than ante- 

 riorly, rhomboid or sublanceolated, and conspicuously carinated ; on 

 the tail, they are elongated, and disposed upon verticils, being cari- 

 nated below as well as above. Upon the lower half of the sides, the 

 Bcales are smooth, as well as on the abdomen ; their shape is sub- 

 rhomboid, and their posterior margin entire, not differing on the pre- 

 anal region, except that they are smaller upon its periphery. The 

 upper and anterior aspects of the fore-limbs are covered with carinated 

 scales, similar to those on the anterior portion of the body. The axilla 

 is granular. The posterior and inferior aspects of the forearm are pro- 

 vided with small and smooth scales. The latter are keeled under the 

 arm, over the palm of the hand, and under the fingers ; on the carpus, 

 they are quite large and smooth, as also upon the fingers. The fingers 

 are very slender, whilst the nails are moderate-sized. The inferior 

 surface of the hind limbs is covered with large and smooth scales ; on 

 the upper surface, the scales are keeled, resembling those of the back. 

 The groin and posterior aspect of the thigh are granular in appearance, 

 so very minute are the scales which cover these regions. On the tarsus 

 and upper surface of the toes, the scales are carinated, as well as be- 

 neath, and on the soles of the feet. 



The upper regions, in the male, are uniform blackish-brown, with 

 two light lateral streaks : the inferior regions being uniform yellowish- 

 brown. In the female, the lateral streaks are whitish ; the upper 

 Btreak lined superiorly with a black fillet ; there is also a dorsal series 

 of small blackish spots, intervening between the two streaks. A 

 whitish line may likewise be observed over the posterior aspect of the 

 thigh, which is, at the same time, dotted with black. The inferior 



