122 BOIDA. 
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, Bote, Isis, 1827, p. 518; Schleg. Bijdr. tot de 
verk. i. p. 2 (1848). : 
Tortrix pseudo-e m Schleg. Phys. Serp. ii. p. 19 (1837), and Abbild. 
1. xxxiv. (1839). 
Balweris pseudo-eryx, Gray, Zoo]. Miscell. p. 46 (1842), 
Platygaster multicarinatus, Dum. § Bibr. vi. p. 497 (1844) ; Jan, 
Icon. Gén. p. 79, 1. 8, pl. 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 preefrontals, 
a large supraocular, two preeoculars, four or five postoculars ; nine 
upper labials, first and second, or second only, in contact with the 
prefrontal, fourth entering the eye. Scales in 53 to 57 rows. 
Ventrals 192-200 ; anal entire; subcaudals 88-92. 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, 88). 
18, ERYX. 
Eryx, part., Daud. Rept. vii. p. 251 (1803). 
Clothonia, Daud. t. c. p. 283; Gray, Cat. Sn. p. 110 (1849), 
Eryx, Wagl. Syst. Amph. p. 192 (1830); Dum. § Bibr. Erp. Gén. 
vi. p. 464 (1844); Gray, l. c. p. 109; Giinth. Rept. Brit. Ind. 
p. 3384 (1864); Jan, Icon, Gén. Ophid. p. 70 (1865); Bouleng. 
Faun. Ind., Rept. p. 247 (1890). 
Gongylophis, Wagl. l.c.; Gray, l.c. p. 108; Giinth. lc. p. 382; 
Bouleng. 1. ¢. p. 246. 
Tortrix, part., Schleg. Phys. Serp. ii. p. 1 (1837). 
Cusoria, Gray, l.c. p. 107. 
Cursoria, Giinth, 1. ce. p. 888. 
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 slightly prehensile ; subcaudals single. 
North and East Africa ; Southern and Central Asia, 
