49 



f ft Head not distinct from neck; internasals fused 

 with praefrontals. 



I. Nostril between two shields; scales in 15 rows. 36. Calamorhabdium ^. 148. 

 11. Nostril in a single nasal; scales in 13 rows. 37. Calamaria p. 149. 



Aquatic, terrestrial or arboreal snakes. Scales imbricate. 

 5. Anoplohydrus Werner. 



(Werner, Mitt. Naturhist. Museum Hamburg XXVI p. 214, 1909). 



Head short, not distinct from neck; eye small; pupil round; 

 nostril directed upwards; nasals divided, in contact behind 

 the rostral; internasals absent; loreal present. Maxillary and 

 mandibular teeth 5 — 6, solid, anterior a little shorter than 

 posterior; palate and pterygoid toothed. Body round, mode- 

 rate, covered with smooth scales, without pits, in 19 rows. 

 Tail short ; subcaudals partly in two rows. 



Distribution. Sumatra. 



A single species. 



I. Anoplohydrus aemulans Werner. 



Atioplohydrus aemulans^ Werner, op. cit. fig. 3. 



Rostral low, scarcely visible from above, more broad than 

 deep ; suture between the nasals 

 as long as the praefrontal ; 

 frontal hexagonal, pointed behind, 

 longer than its distance from the 

 tip of the snout, shorter than the 

 parietals; loreal more long than 

 deep; one prae- and two post- 

 oculars; temporals i + 2; seven 

 upper labials, third and fourth 

 entering the eye '); four lower 

 labials in contact with the ante- 

 rior chin-shields; posterior chin- 

 shields small, separated by scales; 

 mental small, separated from the 

 chin-shields by the first lower 

 labials. Scales in 19 rows, ventrals 159; anal divided; sub- 

 caudals V, + 3 + 30/^^^ I. 



Fig. 27. Anoplohydrus aemulans 

 Werner. After Werner. 



i) The species is figured with 8 labials, the fifth entering the eye, see fig. 27. 

 Indo-australian reptiles II. 4 



