1901.] 



BATBACHIAXS FROM ARABIA. 



149 



The largest of the two adults is four millimetres longer than the 

 largest male yet recorded by me l . 



[Not uncommon in desert between Lahej and Shaikh Othman : 

 only obtained at night by going out with a lantern and looking 

 for tracks in sand and by throwing the sand aside which indicated 

 where the animals had gone down, until they were thrown or had 

 come out again. Chalcides ocellatus was very common in and 

 around Lahej, and in fact everywhere we went. — A. B. P.] 



KHIPTOGrLOSSA. 



CHAM.ELEO^TIDiE. 



19. Cham-eleox calcarifer Peters. 



1 $ . Lahej. 



2 c?. Shaikh Othman. 



1 juv. 2 • Abian country. 



Sex. 



Snout to end 

 of casque. 



Angle of mouth 



to summit of 



casque. 



Snout to 

 vent. 



Vent to tip 

 of tail. 



o* 



<? 



c? 



? 



74 

 71 

 39 

 25 



54 

 50 

 26 

 17 



230 

 195 

 108 



74 



265 

 220 

 122 



80 



In the adult and semiadult the anterior border of the casque is 

 nearly straight, whereas in the other two much younger 

 specimens it is decidedly concave in its curvature. The occipital 

 lobes of the second specimen are somewhat more developed 

 relatively than in the adult. 



OPHIDIA. 



COLUBRID.E. 



20. Zamenis rhodorhaciiis Jan. 

 1. Abian country. 



Snout 

 to vent. 



Tail. 



V. 



A. 



O. 



Scales. 



Upper 

 labials. 



Labials 

 entering eye. 



..655 



245 



221 



1/1 



131 



19 



9+9 



5&6. 



This snake is of a uniform greyish-blue or slate-colour along 

 two-thirds of the length of the trunk, whereas in the latter third 

 and on the upper surface of the tail it passes into purplish brown. 



1 Herpet. Arabia, 1896, p. 50; Zool. of Egypt, Kept. & lialr. 18U8 p. 219. 



