6 ARKIV FÖR ZOOLOGI. BAND 11. N:0 16. 



parietals; a trapezoid occipita] behind interparietal and betwecn 

 the first median pair of dorsal scales. Nasal subtriangular, 

 long and narrow with the large nostril pierced in the middle 

 of its lower börder, and touching the first supralabial; a large, 

 squarish loreal, and behind and below this a subtriangular 

 freno-orbital; tvvo small prseoculars; a rovv of three very 

 narrow elongate infraorbitals; three postoculars, and two very 

 large supraoculars, separated from the orbit by three elongate 

 supraciliars. Temporals not distinct from the scales on the 

 other anterior part of the sides. Eight upper labials; l:st, 

 4:th, and 5:th largest; the two latter below the eye. Chin- 

 shields, one anterior, and three pairs, forming a suture; six 

 lower labials, the two or three hindmost ones much shorter 

 than the anterior. Scales perfectly smooth on the body as 

 well as on the greatest part of the tail; only the scales on 

 the lower surface of the posterior part of the tail are sharply 

 keeled. Sixteen scales round the body; twenty-six scales from 

 the parietals to the base of the tail; sixteen transverse rows 

 on the belly, counted from the före limbs. Prseanal scales 

 six in two rows; five femoral pores on each side. Tail mo- 

 derately long, tapering (the tip is broken in the present spe- 

 cimen). Fingers long and narrow^ first rudimentary, second 

 a little shorter than fifth, fourth longest; toes very long and 

 slender, especially the fourth; the fifth reaches the tip of 

 the second. 



Colour abcve: Head bronzy brown, back olivegreen, tail 

 purplish blue, all parts with metallic gloss. A light, dark- 

 edged dorso-lateral line (yellowish white in front, greenish 

 white behind) runs from the tip of the snout along the supra- 

 ciliary edge to the base of the tail. Below this line the sides 

 of head as well as those of the body are jet-black; the inferior 

 margins of the supralabials are light. The colour of the under 

 parts looks quite different when the animal lies in spirit than 

 when it has been taken up from the jar and become to some 

 extent dried in the air. In spirit the chin is ^^ellowish white, 

 all other parts more or less bluish; the throat is uniform 

 greenish blue, which colour gradually changes into black 

 posteriorly, being effected by the following arrangement. Only 

 the posterior parts of the scales of the belly are blue, the 

 anterior parts black, but the latter colour increases more 

 and more on the posterior scales. The under surface of the 



