1901.] BATRACHIAKS FROM ARABIA.. 151 



This species was first recorded from Arabia by Kiippell. Id 1895 

 it was met with for the first time at Aden by Col. Yerbury l , and 

 in 1896 Bent brought it back with him from the Hadramut. In 

 the smallness of the dark spots the present example corresponds to 

 the Egyptian snakes. Those from Suakin are distinguished by large 

 black spots and more vivid colouring. 



23. Psammophis schokari Forskal. 

 1. Abian country. 



Snout to vent. Tail. 



Ventrals. 



Anals. Caudals. 



Scales. 



228 



155 



181 



1/1 154 



17 



Upper 

 labials. 



Labials 

 entering eye. 



Relation of 

 praeocular 

 to frontal. 



Temporals in 

 contact with 

 postoculara. 



Number of 

 nasals. 



9 



5 & 6 



Broadly in 

 contact. 



o 



2 



A dusky band from the nostril through the eye to the temporal 

 region. Upper parts pale greyish, under surface white, but with a 

 minute black spot generally present in the angle of each ventral. 

 The lineated form of this snake also occurs in the Aden district. 

 15-4 caudals is the highest number yet recorded in Arabia, in which 

 the individuals of this species are distinguished from those found 

 in Africa by the more numerous caudals. 



VlPERID^E. 



24. Cerastes cornutus Hasselq. 





1 2 • Abian country. 



Snout Upper 

 o vent. Tail. V. A. C. Sc. labials. 

 335 42 139 1 37 28 L. 13, R. 12 



Scales between 



labials and eye. 



5 



Horns. 

 None. 



The two extremes, or nearly so, of the range of variation in the 

 ventrals are met with in South-east Arabia, as this individual 

 possesses 139 ventrals, whereas in the Hadramut the highest 

 number of ventrals (164) hitherto recorded of the species is met 

 with. An Aden specimen obtained by Colonel Yerbury in 1895 

 had as many as 159 ventrals. 



25. Ecms CARISATUS Schneider. 

 1 $ . Lahej. 



Snout to vent. Tail. Ventrals. Anal. Caudals. Scales. 



610 5l' 167 1 27 29 



Nasals and 

 Nasals. Bupranasals, Scales round eye. Upper labials. 



2 [n contact with L. 19. B. 21. L. 12. R. 11. 



rostral. Lefl Bupra- 

 nasal excluded. 



1 Proo. Zool. Sue 1895, p. 666 . Eerpet. of Arabia, p. 52. 



