16. CA8AREA. — 17. BOLIEKIA. 121 



16. CASAREA. 



Boa, part., Schleg. Phys. Serp. ii. p. 373 (1837). 



Casarea, Gray, Zool. Miscell. p. 43 (1B42), and Cat. Sn. p. 106 



(1849). 

 Leptoboa, Diim. S,- Bibv. Erp. G6n. vi. p. 485 (1844); Jan, Icon. 



Gen. p. 79 (1865). 



Anterior maxillary and maudibular 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 dussumieri. 



Boa dussumieri, Schler/. P/n/!<. Serp. ii. p. 396 (1837), and Abbihl. 



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

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



(1849). 

 Leptoboa dussumieri, Dinn. S^- Bibr. vi. p. 186 (1844); Jan, Icon. 



Gen. p. 79, 1. 2, pi. i. (IHHl). 



Snout prominent, obliquely truncate. Rostral broader than deep, 

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

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

 with small tubercles ; one or two prse- and four to six postoculai's ; 

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

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

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

 keeled, in 47 to 53 rows. Ventrals 227-2;35 ; 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 small black spots ; lower surface of tail with large 

 black spots. 



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

 millim. 



Round Island, near Mauritius. 



a-b. Hgr. (Sc. 47 ; V. 230 ; C. 123) Round Island. Sir II. Barklv [P.l. 

 &yg. (Sc.47; V. 227 ; C. 120). 



17. BOLIERIA. 



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



Bolveria, Gray, Zool. Miscell. p. 40 (1842), and Cat. Sn. p. 106 



(1849). 

 Platygaster {non Lafr.), Dnm. c^- Bibr. Erp. Gen. vi. p. 496 (1844) ; 



Jan, Icon. Gen. Ophid. p. 78 (1805). 



Anterior maxillary and maudibular teeth a little longer than the 



