6 



ARKIV FÖR ZOOLOGI. BAND 8. NIO 20. 



of the snout, much shorter than the parietals. Eye very small 

 about equal in size to the nostril which is pierced between 

 two nasals, the anterior of which is larger. One prae- and 

 one postocular. Temporals 1+2, the anterior situated below 

 the postocular and wedged in between fourth and fifth labials; 

 the upper posterior temporal in contact with the postocular 

 (in one specimen very narrowly). Six upper labials, the fourth 

 much the largest, in contact with the prseocular, the eye and 

 the postocular. First lower labials entirely separated by the 

 symphysial being in contact with the large chin-shields; three 



Fig. 1. Atractaspis engdahli n. sp. 2 /i nat. size. 



infralabials in contact with the chin-shields; fourth infra- 

 labial very large. Scales in 19 rows. Ventrals 224 — 232; 

 anal divided; subcaudals in two rows forming 19 — 22 pairs. 

 Tail especially in the largest specimen thick, and bluntly 

 pointed in the younger. Uniform dark brown or black above, 

 a little paler below. 



Total length 415 mm.; tail 23 mm. 



This species is very easily recognized by its divided anal 

 and subcaudals, six upper labials the fourth of which alone 

 enters the eye, 19 rows of scales, the first pair of lower 

 labials not meeting behind the symphysial etc. 



Tryckt den 11 augusti 1913. 



Uppsala 1913. Almqvist & Wiksells Boktryckeri-A.-B. 



