20 U. S. NATIONAL MUSEUM BULLETIN 206 



hind leg is adpressed, heel reaches to posterior border of tympanum; 

 when limbs are laid along the sides, knee and elbow nearly meet; 

 when hind legs are bent at right angles to body, heels are barely 

 separated. Skin of dorsum with small scattered tubercles that are a 

 little larger near the midline posteriorly; upper eyelid slightly granu- 

 lar; a row of coarse glandules along dorsolateral line behind parotoid; 

 scapular ridges only slightly indicated; no large tibial gland; ventral 

 regions finely granular, smoother on limbs. No skinfold across chest. 



Dimensions. — Head and body 92 mm.; head length 29 mm,, width 

 37 mm.; femur 37 mm.; tibia 37 mm.; foot 37 mm.; hand 22 mm. 



Color in alcohol. — Dorsum olive, deepening to burnt umber on both 

 sides of the narrow, pale gray, black-bordered midline which extends 

 from between the eyes to the anus; very faint traces of brown cross- 

 bands on arms and legs; sides of head seal brown except for a wide 

 pale-gray area from eye to edge of upper lip ; a pale posttympanic spot ; 

 a narrow brown line below supratympanic ridge and others bordering 

 the pale area below eye; lower edges of glands along dorsolateral line 

 dark seal brown; sides of body mottled with olive and buff; ventral 

 surfaces buff, with traces of two narrow longitudinal lines on center of 

 throat. Bottoms of hands and feet olive, the webs between the toes 

 buff, 



Eemai'ks. — The dorsal pattern of this species is subject to a great 

 deal of variation, as has already been emphasized. The middorsal 

 line may be completely lacking, and the back may be entirely uniform 

 in color, usually drab or oUve, There may be more or less distinct 

 paired dark spots beside the midline, or these spots may be fused into 

 longitudinal stripes, having the outermost border very irregular and 

 the inner border next to the midline very deeply pigmented and fairly 

 straight. The head markings are much less variable, and in all except 

 bleached specimens the wide whitish patch under the eye is set off 

 by the dark brown loreal and temporal patches. 



A specimen from Pernambuco, USNM 57786, is pale and immacu- 

 late on the back, with vestiges of dark and light marblings on the 

 posterior femur, while each of the numerous tubercles is set with a 

 little spiny point so that the entire body seems very rough. In con- 

 trast to this is USNM 97772, an adult female from Alto da Serra, 

 Sao Paulo, which has an irregular pattern of anastomosed brown spots 

 on either side of a narrow light vertebral line that divides at the anus 

 and continues as a narrow white line down the nearly immaculate, 

 drab posterior femm*. The skin of this specimen is fairly smooth, ex- 

 cept for some small tubercles on the^iead and on the upper partslof 

 the limbs. In structure, the only apparent dift'erence is the much 



