106 REPTILES. 



the belly, and sometimes a third central one; ventral shields 212 

 or 220. 



Inhab. Isle Viti. Mus. Paris. 



17. Casaeea. 



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. 3ISS\ Fitz. Syst. Rept. 24, 1843, no 

 character. 



1. The Casarea. Casarea Dussumieri, Gray^ Zool. Misc. 

 43, 1842. Boa Dussumieri, Mus. Paris. Schleyel, Phys. Serp. 

 396. Abbild. 55, t. 17,/. I — 5. Leptoboa Dussumieri, Z)i<w.^5i6. 

 Erp. Gen. vi. 486. Centrophis Dussumieri, Fitz. Syst. Rept. 24. 



Reddish gray, beneath yellow ; tail black-spotted. 



Inhab. Isle Ronde, near Mauritius, Dussumier. Mus. Paris ; 

 one specimen. 



18. BoLYERiA, 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 Colubridce. 



Bolyeria, Gray, Zool. Misc. 43, 1842. Platygaster, Dum. ^ 

 Bib. Erp. Gen. vi.'496. Euroleptes, Fitz. Syst. Rejyt. 24, 1843, no 

 character (not Uroleptis, as cited by Dum. ^ Bibron. Eryx sp., 

 Peron. Boie^ his, 1827, 513. Tortrix sp., Schlegel. 



1. The Bolyeria. 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, 1^843. Tortrix pseudoeryx, Schlegel, Phys. 



