16. CASAEEA. 17. BOLIEEIA. 121 



16. CASAREA. 



Boa, part., Schleg, Phys. Serp. ii. p. 373 (1887). 



Casarea, Cfray, Zool. Miscell. p. 43 (1842), and Cat. Sn. p. 106 



(1849). 

 Leptoboa, Bum. Sr Bibr. Erp. G6n. vi. p. 485 (1844); Jan, loon. 



G&n. p. 79 (1865). 



Anterior maxiUary and mandibular teeth much longer than the 

 posterior. Head very small, distinct from neck; snout covered 

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

 vertical pupil. Body cylindrical, slender ; scales very small, keeled. 

 Tail long, prehensile ; subcaudals single. 



Round Island, near Mauritius. 



1. Casarea dassumieri. 



Boa dussumieri, SoMeg. Phys. Serp. ii. p. 396 (1887), and Abbild. 



pi. xvii. figs. 1-5 (1839). 

 Casarea dussumieri, Gray, Zool. Miscell. p. 43 (1842), and Cat. p. 106 



(1849). 

 Leptoboa dussumieri, Dum. Sf Bibr. vi. p. 186 (1844) ; Jan, Icon. 



GSn. p. 79, 1. 2, pi. i. (1861). 



Snout prominent, obliquely truncate. Eostral broader than deep, 

 not or but scarcely visible from above ; a pair of internasals, one or 

 two pairs of prsefrontals, and a large supraocular ; these shields rough 

 with small tubercles ; one or two pree- and four to six postoculars ; 

 three to five rows of small keeled scales between the supraoculars ; 

 eleven or twelve upper labials, second and third in contact with 

 the prsefrontals, fifth and sixth entering the eye. Scales strongly 

 keeled, in 47 to 53 rows. Ventrals 227-235 ; anal entire ; sub- 

 caudals 120-133. Pale brown above, uniform or with two dark 

 stripes and a lateral series of small dark spots ; a dark streak on 

 each side of the head, passing through the eye ; belly yellowish, 

 uniform or with smaU black spots ; lower surface of tail with large 

 black spots. 



Total length 660 millim. ; tail 180. Beaches a length of 1260 

 mUlim. 



Round Island, near Mauritius. 



a-b Hgr. (Sc. 47 ; V. 280 ; 0. 123) Round Island. Sn- H. Barkly [P.]. 

 &yg:(Sc.47; V. 227; 0.120). 



17. BOLIEEIA. 



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



Bolyeria, Gray, Zool. Miscell. p. 46 (1842), and Cat. Sn. p. 106 



(1849). 

 Platygaster (non Latr.), Dum. ^ Bibr. Erp, Gin. vi. p. 496 (1844) ; 



Jan, lean. G&n. Ophid. p. 78 (1865). 



Anterior maxillary and mandibular teeth a little longer than the 



