181 



gular. Two supra-ciliaries and two very small occipitals. Four upper- 

 labials , the third of them entering the orbit. Mental very small ; five 

 lower-labials. No mental groove. No distinct chin shields, all of them 

 resembling ordinary scales. Ventrals very small. Analdivided, subcau- 

 dals undivided. 



5. Anomalochüus weberi n. sp. (plate XV, fig. 1, 2 and 3). 



Sumatra: Kaju tanam, 1 spec. 



This very interesting species agrees with Tortrix scytale Lin. in the 

 absence of a mental groove, but differs from that species in the arran- 

 gement of the eye, which is not covered by one shield but surrounded 

 by four shields viz. by the supraciliary, the praefrontal, the third 

 upper-labial and the posterior ocular. It agrees with Cylindrophis rufet 

 Laur. in having a supraciliary and a posterior ocular, but it differs 

 both from Cylindrophis rufa Laur. and from Tortrix scytale Lin. in 

 the number of the upper-labials? 



Head very small, depressed, not distinct from neck. The distance 

 between both Corners of the mouth equals the distance from one 

 corner of the mouth to the tip of the snout. Nasals nearly as broad 

 as the praefrontals. Vertical nearly twice as large as the supraciliary, 

 quadrangular, the anterior angle being very obtuse, the posterior al- 

 most a right one. The occipitals small, resembling ordinary scales. A 

 small triangulär postocular. The third upper-labial the largest, touch- 

 ing the eye and the praefrontal. Scales in 21 rows, the ventrals 

 scarcily differing in size with the other scales, 244 in number, a 

 divided anal, six undivided subcaudals, followed by two rows of sca- 

 les at the extremity of the tail. 



Coloration (in spirits) brown, each brown scale with lighter edge. 

 A light spot on each of the praefrontals and on the vertical. On both 

 sides of the back a series of round light spots placed in pairs or 

 alternatively , the number of these spots amounts to 28. Along the 

 middle of the sides runs an interrupted whitish line. The. underparts 

 of the trunk are provided with a large number of irregulär light spots 

 arranged in two longitudinal series, but sometimes flowing together. 



The divided anal is for the greater part whitish ; whilst on the 

 under part of the tail there is a white cross-band the outer parts of 

 which ascend along the sides and reach the back, however without 

 forming a complete ring. At the extremity of the tail two small 

 round spots are seen on the upper part. 



