2 ARKIV FÖR ZOOLOGI. BAND 11. NIG 16. 



small, oval, oblique. Rostral moderately large with a faint 

 longitudinal cleft above. Nostril pierced between rostral, 

 first labial and two nasal scales. Four upper, three lower 

 labials, regularly decreasing in size behind, and followed by 

 scales of ordinary size, which margin tbe angle of the moutb. 

 Mental very large, arrow-shaped, the lateral parts reacbing 

 considerably behind the median one; a distinet median cleft; 

 no chin-shields. No spine-like scale above the eye. Snout 

 with rather large, flat, juxtaposed scales, regularly decreasing 

 in size all över the head to occiput where they are mimitely 

 granular. Dorsal scales moderately large, subimbricate, keeled ; 

 42 — 45 in a longitudinal row betvveen the small occipital 

 granules and a line touching the anterior parts of the bind 

 limbs; the posterior scales are larger and more distinctly keeled 

 than the anterior. Gular scales smooth, rather large, hexa- 

 gonal, juxtaposed; the anterior largest, the posterior much 

 smaller. Ventral scales somewhat larger than the dorsal, 

 smoth, imbricate. Tail cylindrical, tapering, covered with 

 scales similar to those on the body; as long as head and body. 



Colour: Brown above, whitish below; the posterior part 

 of tail brown even below; a dark streak from the snout to 

 the eye, continued behind from the lower margin of the eye 

 to the scapular region; a faint dark line on the occiput from 

 the upper corner of the eye. 



Measiireraenis; Total iength 13 + 12 mm. Width of head 

 2,1 mm. From snout to ear-opening 3,2 mm. Före limb 4,5 

 mm. Hind limb 5,5 mm. 



One specimen. Amazonas, Manaos, Lago Poraquecuare 

 ^Vö 1915. In the neighbourhood of the farm. 



Uraniscodou tuberculatum n. sp. 



Snout very short and rounded, nostril small, turned up- 

 wards, situated above canthus rostralis. Supraciliary edge 

 projecting. Scales on upper side of head juxtaposed, irre- 

 gular, provided with distinet tubercle-like keels, the upper 

 edges of which sometimes are finely prickled. Supraocular 

 scales similar to those of the head, but four of them are 

 somewhat enlarged, forming a median row; interorbital region 

 with two series of scales, diverging in front and behind. 



