ZOOLOGY REPTILES. 21 



DIMENSIONS. Length of head, neck, and body, 4^ inches ; greatest breadth of head, If inch ; 

 length of anterior extremities, If inch ; of foot, anteriorly, to extremity of longest toe, 1 inch ; 

 of posterior extremity, 5 inches ; length of hind foot, If inch ; of foot, posteriorly, to distal 

 end of longest toe, 2f inches. 



HABITAT. El Paso Creek. 



GEN. OBS. This species is remarkable for the great length of its posterior extremities ; allied 

 to Rana Draytoni, Baird and Girard, but the posterior extremities appear to be longer. 



FAMILY II. 



HYLID.E. 



CHAR. 1. Extremities of toes and fingers enlarged into a disk or viscous pellet, by means of 

 which they sustain themselves on smooth surfaces, as leaves, glass, &c. ; always found on trees, 

 or shrubs, or plants, except in the breeding season. 



CHAR. 2. Abdomen, in general, covered with small granulations, with glandular openings ; 

 teeth, tongue, &c., same as in Ranidce. 



HYLA NEBULOSA, Nob. 



CHAR. Uniform light gray upon the upper part of the body and sides ; a considerable num 

 ber of dark colored subcircular spots, about a line in diameter, scattered over the upper part of 

 the body, and upon the sides, in some specimens mingled with irregular blotches upon the back ; 

 extremities, ash color above, with grayish spots ; abdomen, greenish yellow: chin light yellow ; 

 under surface of extremities orange colored ; abdomen and under surface of extremities granu 

 lated, terminal disks much flattened ; vomerine teeth in two oblique patches, their anterior and 

 posterior extremities on a line with the corresponding margins of the internal nares. 



DIMENSIONS. Length of head, neck, and body, 1 inch ; greatest breadth of head, f inch ; 

 length of anterior extremities, If inch ; of posterior extremities, 2f inches to extremity of 

 longest toe. 



HABITAT. Tejon Pass. 



GEN. OBS. Is a much smaller animal than Hyla versicolor, and the markings are very differ 

 ent. The back is much less abundantly covered with warts, and the supraciliary ridges, which 

 are so much developed in versicolor, are but slightly so in this species. The extremities are 

 much more slender in the latter, and the tibia is of nearly equal length with the thigh, but in 

 versicolor it is about a line shorter. This animal resembles Hyla delitescens, but the skin of B. 

 delitescens is smooth ; in both the specimens of nebulosa, the back is covered with very minute 

 pustulations. From the other North American Hylce it may be readily distinguished. 



HYLA SCAPULABIS, Nob. 1 

 Var. HYPOCHONDRIACA. 



CHAR. Of a uniform pale olive color, above, without spots, paler toward the sides ; numerous 

 small, elevated, smooth points upon the surface, resembling tubercles ; upper surface of extremi- 



1 The specimens of scapularis are much smaller than those received from Oregon, but I cannot make out that they are 

 distinct species. 



