106 REPTILES. 
the belly, and sometimes a third central one; ventral shields 212 
or 220. 
Inhab. Isle Viti. Mus. Paris. 
17. CASAREA. 
Head depressed behind, covered with scales; muzzle shielded, 
with two internasal, two frontonasal, and prefrontal and supra-ocular 
plates: nostrils lateral (in the middle of a plate ?): eyes lateral ; 
pupil elliptical, vertical: labial shields not pitted: body slender, 
much compressed: scales keeled: tail elongate, slender: subcaudal 
plates one-rowed: spur inconspicuous. 
Casarea, Gray, Zool. Misc. 43, 1842 (not Caseara, as written 
by Dum. & Bibron, vi. 485). Leptoboa, Dum. §& Bib. Erp. Gen. vi. 
485. Centrophis, Hempr. MSS. Fitz. Syst. Rept. 24, 1843, no 
character. 
1. The CasareEa. Casarea Dussumieri, Gray, Zool. Misc. 
43,1842. Boa Dussumieri, Mus. Paris. Schlegel, Phys. Serp. 
396. Abbild. 55, t. 17, f. 1\—5. Leptoboa Dussumieri, Dum. § Bib. 
Erp. Gen. vi. 486. Centrophis Dussumieri, Pitz. Syst. Rept. 24. 
Reddish gray, beneath yellow ; tail black-spotted. 
Inhab. Isle Ronde, near Mauritius, Dussumier. Mus. Paris; 
one specimen. 
18. Botyeria, Gray. 
Head covered with symmetrical plates, viz., one pair internasal, 
one pair frontonasal bent down on the sides, one pair frontal, one 
pair supra-ocular, one pair parietal, two pre- and four post-oculars : 
nostrils lateral, in the middle of a plate: eyes anterior, lateral; pu- 
pil elliptical, erect: labial plates not pitted: body subcylindrical : 
scales hexagonal, three-keeled : tail short, broad. 
Allied to Eryx ; habit of Colubride. 
Bolyeria, Gray, Zvol. Misc. 43, 1842. Platygaster, Dum. & 
Bib. Erp. Gen. vi. 496. Euroleptes, Fitz. Syst. Rept. 24, 1843, no 
character (not Uroleptis, as cited by Dum. §& Bibron. Eryx sp., 
Peron. Boie, Isis, 1827, 513. Tortrix sp., Schlegel. 
1. The Botyeria. Bolyeria multicarinata. Eryx multo- 
carinatus, Peron, MSS. Boie, Isis, xx. 513.  Platygaster multi- 
carinatus, Dum. & Bib. Erp. Gen. vi. 497. Euroleptes pseudoeryx, 
Fitz. Syst. Rept. 24,1843. Tortrix pseudoeryx, Schlegel, Phys. 
