1892.] AND BATRACHIANS FROM BARBARY. 23 



was obtained, establish the fact that the Saharian fauna extends to 

 that district, and moreover the Snake has all the features of a desert 

 form. 



The majority of the specimens of V. lebetina hitherto recorded 

 have come from the Tell region of Western Algeria, but examples of 

 this species have also been mentioned from Batna on the liigh plateau 

 and likewise from Bona on the coast, in the Tell region. As our 

 knowledge of the northern portion of the Sahara intervening between 

 Duirat and Egypt becomes more extended, it is probable that this 

 variety of V. lebetina will be found to occur tliroughout that district, 

 and, possibly, in Egypt itself. 



Genus Cerastes, Wagler. 



10. Cerastes vipera, Linnaeus ; Boulenger, op. cit. p. 155. 



1 c? & 1 $ , Dnirat, Tunisia. 



<S . Total length 252 millim., tail 32. Ventrals 107, subcaudals 



32 ; rows of scales 23. 

 $. Total length 2-18 millim., tail 22. Ventrals 117, subcaudals 



22 ; rows of scales 23. 

 Mr. Boulenger mentions that although M, Lataste did not come 

 across this Viper in Tunisia, several specimens from the southern 

 part of that province are in tlie possession of Marquis Doria. 



BATRACHIA. 



Order ECAUDATA. 



Family I. Ranid^e. 



Genus Rana, Linnaeus. 



1. Rana esculenta, Linnaeus; Boulenger, loc. cit. p. 157. 



5, Algiers ; 4, Ilammam R'irha, Province of Algiers ; 3, Biskra. 



These specimens belong to the var. ridibunda, Pallas, the most 

 ■widely distributed race, and the only one found in Barbary. Mr. 

 Boulenger has recently given ' the measurements of the largest of 

 my specimens from the last two of the localities recorded above. 



Family IL Bufonid^e. 

 Genus Bufo, Laurenti. 



2. Bufo viridis, Laurenti ; Boulenger, loc. cit. p. 158. 



1 young specimen, Laurier-Rose Station on the railway to 

 Tlem9en ; 2 specimens, Duirat. 



3. Bufo mauritanicus, Schlegel ; Boulenger, loc. cit. p. 158. 



1 specimen, Tlem^en, Province Oran ; 2 specimens, Hammam 

 R'irha, Province Algiers; 2 specimens, Algiers; 2 specimens, 



Biskra. 



1 Proc. Zool. Soc. 1891, p. 379. 



