Batrachians and Reptiles from Angola. 113 



32. Bhamphiophis acutus, Gthr. 



Between Benguella and Bilie. 



Upper portion of rostral shield considerably shorter than 

 its distance from the frontal. Ventrals 168-183, caudals 

 53-59. 



S3. Psammophis sihilans, L. 



Duque de Bragan^a, Pungo Andongo. 



34. Psammophis Ansorgii, sp. n. (PL IV. fig. 4.) 



Snout but slightly longer than the eye. Rostral a little 

 broader than deep, just visible from above ; nostril between 

 two or three shields ; internasals two thirds the length of 

 the prsefrontals ; frontal twice as long as broad, longer than 

 its distance from the end of the snout, as long as the 

 parietals ; loreal barely once and a half as long as deep ; one 

 pr^ocular, in contact with the frontal ; two postoculars ; 

 temporals 2 + 2; seven upper labials, third and fourth 

 entering the eye ; four lower labials in contact with the 

 anterior chin-shields, which are shorter than the posterior. 

 Scales in 15 rows. Ventrals 153 ; anal divided ; sub- 

 caudals 76. Grey above, with a very indistinct streak of 

 rusty along each side of the back ; no markings on the upper 

 surface of the head ; pra^- and postoculars yellowish ; a 

 wdiite black-edged streak on the upper lip, the upper outline 

 crossing the rosti-al, the lower half of which is white ; lower 

 parts uniform white. 



Total length 700 mm. ; tail 165. 



A single male specimen from between Benguella and Bihe. 



This very distinct species is most nearly related to the 

 South-African P. crucijer, Daud., from wdiich it differs in 

 the larger eye, the shorter snout, and the coloration. 



35. DispJiolidus typus, A. Smith. 

 Between Benguella and Bihe. 



36. Xenocalamus Mechovii, Peters. 

 Between Benguella and Bih^. 



A single male specimen, measuring 395 mm., tail 30. 

 Ventrals 217, caudals 25. The two postoculars confluent into 

 one. Black above, with white spots forming more or less 

 regular cross-bars ; upper lip, two outer rows of scales, and 

 lower parts white, each ventral and subcaudal shield with 

 crowded black dots forming; cross-bars. 



