1892.] AND BATRACHIANS FROM BARBARY. 19 



the labials. Tlie temporals also are variable, as in No, 2 they are 

 3 + 3 on one side and 2 + 3 on the other. The number of sub- 

 caudals in No. I exceeds the maximum given by Mr. Boulenger, and 

 its anal is entire, while in No. 2 these plates fail below the minimum 

 recorded by him. His figures are 92-100. Their coloration is 

 normal. 



2. Zamenis hippocrepts, Linnaeus ; Boulenger, op. cit. p. 147. 



1 specimen, Haramam Meskoutine, Province of Constantine ; 

 1 specimen, neighbourhood of Algiers. 



In the first specimen there are 10 upper labials on one side, and 

 two temporals in contact with the postoculars. 



3. Zamenis diadema, Schlegel ; Boulenger, op. cit. p. 148. 



1 specimen, Duirat, Tunisia ; 1 specimen, between Biskra and 

 Tuggurt. 



The snake from Duirat has 25 rows of scales, and the Biskra- 

 Tuggnrt specimen 32. The head-shields present some of the 

 variations usual to this species. 



The Duirat specimen has the pale yellowish sandy coloration of a 

 desert form ; the ty[)ical dark rhombic markings are distinct, but the 

 horn-colour has a faded appearance. 



Genus Tropidonotus, Kuhl. 



4. Tropidonotus viperinus, Latr. ; Boulenger, loc. cit. p. 149. 



1 specimen, Hammam R'irha, Province of Algiers ; 1 specimen, 

 Biskra ; 6 specimens, between Biskra and Tuggurt ; 1 specimen, 

 Duirat, Tunisia. 



The first specimen has the rare variation of 23 rows of scales. 



Genus Macroprotodon, Guichenot. 



5. Macroprotodon cuctjllatus, Geoffroy j Boulenger, loc. cit. 

 pp. 149, 150. 



1 specimen, Hammam Meskoutine, Province of Constantiue, 

 among stones. 



Total length 539 millim., tail 93. Ventrals 171 ; subcaudals 54. 

 It has 1 9 rows of scales, which is generally the case in Algerian and 

 Tunisian specimens, as pointed out by Mr. Boulenger. 



Genus Psammophis, Boie. 



6. Psammophis sibilans, Linnaeus ; Boulenger, foe. cit. p. 150. 



1 specimen, Duirat, Tunisia. 



Total length 975 millim., tail 341. Ventrals 179; subcaudals 

 131. A partially divided prseocular on each side ; 9 upper labials, 

 the 5th and 6th entering the orbit, as in the case of all Algerian and 

 Tunisian specimens found bv M. Lataste. 



2* 



