88 



LACEETIDyE. 



three anterior pairs of chin-sliields in contact. A more or lesa 

 marked transverse gular fold, connecting the ears ; collar curved 

 or more or less angular, free or attached (sometimes indistinct) 

 in the middle, formed of 8 to 11 plates. Dorsal scales roundish, 

 convex, smooth, juxtaposed, 40 to 55 across the middle of the 

 body. Ventral plates in straight longitudinal and transverse series, 

 broader than long ; in ten longitudinal series, the outer series com- 

 posed of very small plates ; 26 to 32 transverse series. Normally 

 a large pra^anal i)late, bordered by two semicircles of smaller ones. 

 The hind limb reaches the shoulder, or not so far, in the female, the 

 shoulder or halfway between the shoulder and the ear in the male ; 

 foot as long as the distance between the arm and the anterior border 

 of the orbit or the centre of the eye ; one series of large, and two of 

 small, subtibial plates. 10 to 17 femoral jwres. Tail once and a half 

 to twice the length of head and body ; upper caudal scales strongly 

 keeled ; basal subcaudals smooth or very obtusely keeled. Greyish or 

 rufous-brown above, with ver)' variable markings ; series of black 

 spots and white ocelli, or series of more or less confluent blackish 

 spots along the body ; some specimens with irregularly scattered 

 blackish dots, or with regular blackish and white longitudinal 

 lateral bands ; others with a broad dark grey vertebral band with 

 a series of shaft-like blackish marks on each side of it, &c. ; lower 

 surfaces white. 



S. 2- 



millim. millim. 



Total length 152 168 



Head 13 11 



Width of head 8 8 



From end of snout to fore limb 20 20 



From end of snout to vent 50 55 



Fore limb 19 17 



Hind limb 31 28 



Tan 102 113 



North Africa ; South-western Asia, from Arabia and Syria to 

 Sind. 



b. Hgr. 



c. $. 



d. 2. 



e. 6. 



f-ff- d 2 ■ 



h-l. cS 2 ' 



m. Hgr. 



n. Several spec; 



c?,$,&hgr- 

 0. c7. 

 p. 2. 

 g- c?. 



Aumale, Algeria. 

 Laghouat, Algeria. 

 Tibremt, Algeria. 

 Oabes, Tunis. 

 Susa, Tunis. 

 N. Africa. 

 Socotra. 



Sinaitic Peninsula. 

 Mt. Sinai. 



Beerslieba. 



Neby Musa, Dead Sea. 

 Near Isfehan, between 

 Shiraz and Teheran. 



M. Lataste [P.]. 



M. Lataste [P.]. 



M. Lataste [P.J. 



M. Lataste [P. |. 



Mr. Fraser [C.]. 



Berlin Museum. 



Prof. I. B. Balfour [C.]. 



(Tvpes of i?. balfouri.) 

 H. 0. Hart, Esq. [C.]. 



Canon Tristram [C.]. 



Dr. Aiidorson [P.]. 



W. T. Blanford, Esq. [C.]. 



