4 ARKIV FÖR ZOOLOGI. BAND 11. NIO 10. 



terior corner of the eye; the scales of the limbs resemble 

 those on the body. Fingers and toes long and slender, and 

 angularly bent at the articulations. Tail round, slender, 

 tapering, twice as long as head and body; the scales of the 

 tail sharply keeled, arranged in verticils, which are composed 

 of five or six transverse rows of scales (five on the anterior, 

 six on the posterior part); the scales in the hindmost rovv 

 much larger than those in the others. 



Colour in spirit: Greyish brown above, marbled with light 

 and chestnut brown and with faint dark cross bands; there 

 are three series (a median and two lateral ones) of light, 

 rather indistinct spöts and traces of the same distribution of 

 the dark colour. The dorsal crest with alternating dark and 

 white parts; a black spöt on the antehumeral fold; two dark 

 angular transverse bars between the eyes and a semilunar 

 spöt on the snout. Distinct narrow dark lines, or broad 

 band radiate from the eye to the supraciliary edge, to the 

 margin of the upper jaw and to the tympanum; a broad 

 dark-edged band from the angle of the mouth to below the 

 tympanum, and narrow lines on the chin extending back- 

 wards from the margin of the lower jaw. Other under parts 

 of the body and the whole tail nearly uniformly greyish 

 brown, the latter with indications of dark cross bars. Limbs, 

 fingers, and toes marbled and barred with blackish brown. 



One specimen from San Fermin, North Western Bolivia. 

 Nils Holmgren. 1904. 



Measurements: 



From tip of snout to vent 53 mm. 



Length of tail 110 » 



From tip of snout to hind margin of tympanum . 14 » 



Breadth of head 11 ^ 



Length of snout 6 » 



Diameter of orbit 4,5 » 



Length of före limb 30 » 



Length of hind limb 43 » 



This species is apparently nearly allied to U. iimhra L. 

 but it appears to be well distinct from that one by a quite 



