654 



DR. J. AlfDBESON ON EBPTILES AND 



[June 18, 



Dipterygium glaucum, a small purple chameleon about four inches 

 long. Although 1 kept a sharp look out for a specimen during my 

 recent visit to Aden, I failed to obtain one, but I saw one in the 

 possession of two Frenchmen who visited Lahej when I was there. 

 It may be the young of C. calcanfer or possibly another species, 

 but I am disposed to think that it is the former." 



OPHIDIA. 



17. Zamenis ehodoehachis, Jan \ 



Zamenis i-hoclorhachis, Jmn, Boulenger, Cat. Snakes B. M. i. 1894, 

 p. 398. 



1 2 and 3 juv. Aden. 



The variation in the number of the ventrals of this species is 

 very great, ranging from 213 to 262. The highest number occurs 

 in Egypt and in Midian, and in the former country no specimen 

 has yet been found with a lower number of ventrals than 248. In 

 Eastern and South-eastern Arabia, Muscat to Aden, the ventrals 

 range from 220 to 239, while, on the other hand, from Bushire to 

 Baluchistan (Kalagan) these numbers fall very low, the range being 

 fi-om 214 to 218. In the Bugti hills, on the right bank of the 

 Indus, to the north of Jacobabad, and in North-western India, 



' I am indebted to the Trustees of the Indian Museum for the opportunity of 

 re-examining the types of Z. ladacensis. They are unquestionally identical with 

 Jan's Z. rhodorhackis. At the time I describwl the species, Jan's work was not 

 in the Library of the Indian Museum, Calcutta. 



" B. C. signifies "broadly in contact"; C. "contact"; and N. C. " not in 

 contact." 



