122 BOID^. 



posterior. Head very small, not distinct from neck ; snout covered 

 with shields ; nostril pierced in a single nasal. Eye very small, 

 with vertical pupil. Body cylindrical. Scales small, hexagonal, 

 juxtaposed or very feebly imbricate, tri- or quinquecarinate. Tail 

 moderate, feebly prehensile ; subcaudals single. 

 Round Island, near Mauritius. 



1. Bolieria multicarinata. 



Eryx multocarinata, Boie, Isis, 1827, p. 513; Schleg. Bijdr. tot de 



Dierk. i. p. 2 (1818). 

 Tortrix pseudo-eryx, Schleg. Phys. Serp. ii. p. 19 (1837), and Ahhild. 



pi. xxxiv. (1839). 

 Bolyeria pseudo-eryx, Gray, Zool. Miscell. p. 46 (1842). 

 Platygaster multicarinatus, Diim. Sf Bibr. vi. p. 497 (1844) ; Jan, 



Icon. Gen. p. 79, 1. 3, pi. iii. (18G4). 

 Bolyeria multicariuata, Gray, Cat. p. 106 (1849) ; Kreft, Proc. Zool. 



Soc. 1802, p. 225. 



Snout very prominent, rounded. Rostral broader than deep, just 

 visible from above ; a pair of interuasals, a pair of large prasfrontals, 

 a large supraocular, two prasoculars, four or live postoculars ; nine 

 upper labials, first and second, or second only, in contact with the 

 pryefrontal, fourth entering the eye. Scales in 53 to 57 rows. 

 Ventrals 192-200 ; anal entire ; subcaudals 83-92. Pale brown or 

 greyish olive above, with small darker spots, which may form an 

 irregular network ; a dark streak on each side of the head behind 

 the eye ; a series of blackish vertical bars on each side of the tail ; 

 yellowish beneath, spotted or marbled with blackish. 



Total length 1000 millim. ; tail 200. 



Round Island, near Mauritius. 



a-b. 2 (Sc. 53, 57 ; V. 199, 200 ; Round Island. Sir H. Barkly [P.]. 

 C. 92, 83). 



18. ERYX. 



Eryx, part., Datid. Rept. vii. p. 251 (1803). 



Clothonia, Baud. t. c. p. 283; Gray, Cat. Sn. p. 110 (1849). 



Eryx, Wayl. Syst. Amjjh. p. 102 (1830); Bum. S,- Bibr. Erp. Gen. 



vi. p. 454 (1844); Gray, I. c. p. 109; Giinth. Rept. Brit. Ind. 



p. 334 (1864) ; Jan, Icon. Gen. OjMd. p. 70 (1805) ; Bouleny. 



Faun. Ind., Rept. p. 247 (1890). 

 Gongylophi.s, Wayl. I.e.; Gray, I.e. p. 108; Giinth. I.e. p. 332; 



Bouleny. I. c. p. 246. 

 Tortrix, part., Schley. Phys. Serp. ii. p. 1 (1837). 

 Cusoiia, Gray, I. c. p. 107. 

 Cursoria, Gimth. I. c. p. 333. 



Anterior maxillary and mandibular teeth longer than the pos- 

 terior. Head not distinct from neck, covered with small scales ; 

 rostral large. Eye small or very small, with vertical pupil. Body 

 cylindrical. Scales small, smooth or keeled. Tail very short, not 

 or but very sHghtly prehensile ; subcaudals single. 



North and East Africa ; Southern and Central Asia. 



