432 ANELTTROPID^. 



ing one fourth or one fifth of the length of the shielded part of the 

 head ; eye more or less clearly distinguishable through the ocular, 

 which is small and followed by two postoculars ; three azygos upper 

 head-shields, viz. a praefrontal, a frontal, and an interparietal, latter 

 largest ; a pair of supranasals between the rostral and the nostril, 

 in contact with the tirst lalnal on each side ; a lorcal, a praiocular, 

 and a supraocular ; first upper labial largest, third in contact with 

 the ocular ; a short and broad mental, followed by a narrower 

 shield. Scales cycloid, a little broader than long, 25 longitudinal 

 series in the middle of the body. Tail measuring one third or not 

 quite one third of the total length, ending obtusely. Dark brown 

 or olive, young blackish. 



Total length 310 millim., tail 105, 



West Africa. 



a-b. Ad. & yg. Angola. J. Curror, Esq. [P.]. 



(Types.) 



c. Ad. Angola. J. J. Monteiro, Esq. [C.]. 



d. Hgr. Gaboon. 



e-f. Ad. & yg. Sierra Leone. Dr. A. Giinther [P.]. 



3. TYPHLOSAURUS. 



Tvphline (non Wagl.), Wiegm. Herp. Mex. p. 11 ; Dum, i^- Bibr. v. 



'p. 835 ; Gray, Cat. Liz. p. 128. 

 Typhlosaurus, Wiegm. I. c. p. 64. 



Nostril pierced in the very large rostral shield, which covers the 

 snout, connected with the posterior border of that shield by a long 

 straight suture. Scales broad, hexagonal or tetragonal. A large 

 prjeanal scale. 



South Africa. 



Synopsis of the Species. 



I. Rostral not longer than the other upper head-shields together ; 



interparietal twice as long as frontal. 



Snout with sharp horizontal edge ; 14 



scales round the middle of the body . . 1. lineatus, p. 432. 

 Snout conical, rounded ; 12 scales round 



the body 2. aurantiacus, p. 433. 



II. Rostral at least twice as long as the other upper head-shields ; 



interparietal not larger than frontal. 



Scales hexagonal, 14 round the body . . 3. ccecits, p. 434. 

 Scales mostly tetragonal, 12 round the 



body 4. vermis, p. 434. 



]. Typhlosaurus lineatus. (Plate XXVIII. fig. 3.) 



Snout strongly })roiecting, with sharp horizontal edge, tint infe- 

 riorly. Rostral a little shorter than the other head-shields together ; 



