BISTELLA. 215 



Synopsis of the Species. 



A. A pair of small preefrontals ; froutonasal 

 forming a suture with frontal. 



a. Ear-opening much larger than nostril ; 



dorsal scales feebly bi- or tricarinate . . R. nirh'i, p. 215. 



b. Ear-opening not, or but slightly, larger than 



nostril ; dorsal scales sharply bicarinate. R. travancorica, p. 210. 

 E. Two azj'gos shields between rostral and 

 frontal. 

 rt. 22 to 24 scales round middle of body ; 



adpressed limbs not meeting B. guentheri, p. 210. 



h. 20 scales round body ; adpressed limbs 



meeting or overlapping R. beddomii, p. 210, 



a b 



Fig. .^)7.— Foot o{ Eistclla rnrkii. a. Upper riow, h. Lower view. 



218. Ristella rurkii. 



Ristella rurldi, Gray, Ann. N. H. ii, 1830, p. 333; Gimih. P. Z. S. 



1875, p. 225 ; Boiiloif/. Cot. Liz. iii, p. 357, pi. xxix, fig. 1. 

 Ateuchosaunis travancoricus, part., Beddome, Madras jotirn. Med. Sc. 



1870. 

 Ristella travancorica, Bedd. op. cit. 1871 (part.) ; Sfoliczha, J. A. S. 



B. xli, 1872, p. 120, pi. iv, fig. 5 ; Theob. Cat. p. 54. 



Head small ; snout short, obtuse. Ear-opening much larger than 

 the nostril. Frontonasal broader than long, widely separating tlie 

 nasals ; prtefrontals present, widely separated ; frontal shorter than 

 frontoparietals and interparietal together ; 5 supraoculars, 3 an- 

 terior in contact with the frontal; 10 supraciliaries ; parietals 

 forming a suture behind the interparietal ; no nuchals ; third, 

 fourth, and fifth upper labials belo\\' the eye, from which they are 

 separated by a series of small scales. 26 scales round the middle 

 of the body, laterals a little smaller than dorsals and ventrals, dorsals 

 and laterals feebly bi- or tricarinate. Prjeanal scales not or scarcely 

 enlarged. Limbs short, widely separated when adpressed ; third 

 and fourth toes equal. Tail cylindrical, 1| to 1| times the length 



