1892.] AND BATRACHIANS FROM BARBARY. 19 



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

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

 caudals in No. 1 exceeds the maximum given by Mr. Boulenger, and 

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

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

 normal. 



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



1 specimen, Hammam Meskoutine, Province of Constantine ; 

 1 specimen, neighbourhood of Algiers. 



In the first specimen there are iO 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 2.5 rows of scales, and the Biskra- 

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

 variations usual to t!.is species. 



The Duirat specimen has the pale yellowish sandy coloration of a 

 desert form ; the typical 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 cucullatus, Geoffroy ; Boulenger, loc. cit. 

 pp. 149, 150. 



1 specimen, Hammam Meskoutine, Province of Constantine, 

 among stones. 



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

 It has 19 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, /oc. cit. p. 150. 



1 specimen, Duirat, Tunisia. 



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

 131. A partially divided praeocular on each side ; 9 ufiper labials, 

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

 Tunisian specimens found by M. Lataste. 



