614 MR, G. A. BOULENGER ON THE 



Synopsis of the Bijecies. 



I. No prseoculav ; no subocular ; ocular in contact with two 

 upper labials; snout with sharp horizontal edge; ej^es 

 hidden ; 22 scales round middle of body, the diameter of 



which is 80 times in total length T. gracilis. 



II. A prseocular; no subocular; ocular in contact with two or three upper labials. 



A. Nostrils lateral ; snout rounded ; ej'es distinct. 



20 scales round middle of body, the diameter of which is 35 to 



50 times in total length T. Iraminus. 



24 scales round middle of body, the diameter of which is 50 to 



60 times in total length T. platyrhynchus. 



B. Nostrils inferior ; snout rounded or with obtusely angular horizontal edge. 



1. Eyes hidden. 



22 or 24 scales round middle of body, the diameter of which 



is 40 to 50 times in total length T. ohtusus. 



20 scales round middle of body, the diameter of which is 



25 times in total length T. tornieri. 



34 scales round middle of body, the diameter of which is 



23 times in total length T. mandensis. 



2. Ej'es distinct. 



a. A small shield separating the praeocular from the 

 upper labials ; 28 scales round middle of body, 

 the diameter of which is 50 times in total 



length T.gierrce. 



h. Prseocular in contact with upper labials. 

 Nasal completely divided : 24 scales round middle of body, the 



dia,meter of which is 30 times in total length T. niossambicus. 



Nasal incompletely divided, the cleft not quite reaching the 

 rostral; 24 scales round middle of body, the diameter of 



which is 37 or 38 times in total length T. tettensis. 



Nasal incompletely divided, the cleft not reaching the rostral ; 



26 to 30 scales round middle of body, the diameter of 



which is 24 to 30 times in total length T. punctatus. 



C. Nostrils inferior; snout with sharply angular horizontal edge; eyes distinct. 

 Lower surface of rostral broader than long; 38 to 44 scales 



round middle of body, the diameter of which is 25 to 32 



times in total length T. schlegelii. 



Lower surface of rostral broader than long ; 34 to 40 scales 

 round middle of body, the diameter of which is 42 to 46 

 times in total length T. dinga. 



Lower surface of rostral as long as broad ; 30 to 38 scales round 

 middle of body, the diameter of which is 25 to 37 times in 

 total length T. muo-nso. 



III. A praBocular ; ocular small, separated from the upper labials by a larger 



subocular ; diameter of body 50 to 63 times in total length. 

 Snout rounded ; eyes hidden ; 22 scales round middle of body. T. pallidiis. 

 Snout with sharp horizontal edge; eyes hidden; 18 scales 



round middle of body T. himbriciformis. 



Snout with sharp horizontal edge ; eyes distinct ; 24 scales 



round middle of body T. unitceniatus. 



1. Typhlops gracilis Sternf. Mitth. Zool. Mus. Berl. v. ISIO, 

 p. 70. 



Urungu, German East Africa. 



2. Typhlops braminus Daud. 

 Bouleng. Cat. Sn. i. p. 16. 



Southern Asia ; islands of the Indian Ocean (including Mozam- 

 bique island) ; South Africa ; Lagos ; Mexico. — Distribution 

 probably ascribable to transport by human agency. 



