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 quinqueearinate. Tail 

 moderate, feebly prehensile ; suboaudals single. 

 Eound Island, near Mauritius. 



1. Bolieria multicarinata. 



Eryx multocarinata, Boie, Ids, 1827, p. 513 ; Sohkg. Bijdr. tot de 



Dierk. i. p. 2 (1848). 

 Tortrix paeudo-eryx, Schleg. Phys. Serp. ii. p. 19 (1837), and Ahbild. 



pi. xxxiv. (1839). 

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

 Platygaster multicarinatus, Bum. 8f Bihr. vi. p. 497 (1844) ; Jan, 



Icon. Gen. p. 79, 1. 3, pi. iii. (1864). 

 Bolyeria multicarinata, Gray, Cat. p. 106 (1849) ; Krefft, Proc. Zool. 



Soc. 1862, p. 225. 



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

 visible from above ; a pair of internasals, a pair of large praefrontals, 

 a large supraocular, two preeoculars, four or five postoculars ; nine 

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

 priefrontal, 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. 5 (Sc. 53, 57 ; V. 199, 200 ; Round Island. Sir H. Barkly [P.]. 

 0. 92, 83). 



18. ERYX. 



Eryx, part.. Baud. JRept. vii. p. 251 (1803). 



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



Eryx, Wagl. Syst. Amph. p. 192 (1830) ; Bum. 8f Bibr. Erp. Gen. 



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



p. 334 (1864) ; Jan, Icon. Gen. Ophid. p. 70 (1865) ; Bouleng. 



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

 Gongylophis, Wagl. I. c. ; Gray, I. c. p. 108 ; Gunth. I. c. p. 332 ; 



Bouleng. I. c. p. 246. 

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

 Cusoria, Gray, I. c. p. 107. 

 Cursoria, Gunth. 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. 



