SNAKES. 107 
Serp. ii. 19. Abbild. 112, t. 34. Bolyeria pseudoeryx, Gray, Zool. 
Mise. 46, 1842. 
Scales of the back six-sided, three-keeled. 
New Holland, Port Jackson, Peron. Mus. Paris. 
II. Tazl very short, not (or only slightly) prehensile. Head very 
small, indistinct. 
a. The head covered with scales; intermazxillary teeth and supra- 
orbital bone wanting : scales convex : subcaudal plates one-rowed : 
anal spurs distinct, small. Erycina. 
Eryxina, Gray, Zool. Misc. 43, 1842. | Pythoniens, Aprotero- 
dontes, Erycides, Dum. & Bib. Erp. Gen. vi. 451. Pythonoides 
pars, Hitz. N. Class. Rept. 1826. Constrictores pars, Oppell, Rept. 
1811. Isodonta pars, Muller. Colubrini pars, Bote, Isis, xx. 510. 
Colubriens pars, Latreille, Fam. Nat. Gongylophes, Fitz. Syst. 
Rept. 24, 1843. 
* Muzzle rounded in front. 
19. Cusoria. 
Head elongate, covered with rather large, imbricate, nearly 
symmetrical, smooth scales: rostral rather large, broad, low, trian- 
gular, flattened beneath: internasal shields 2, rather large, trans- 
verse ; superciliary shield none: eyes surrounded by a ring of square 
scales: lores with several scales in two series: nostrils lateral, be- 
tween three plates, the internasal and two nasals: eyes lateral ; 
upil ?; body fusiform ; tail rather tapering: scales of the 
head and body ovate, rather convex, smooth; lower series rather 
larger: ventral and subcaudal plates narrow. . 
1. The Cusorta. Cusoria elegans. 
Pale brown in spirits: back with two series of large more or 
less confluent brown spots ; sides with two series of small brown 
spots ; belly brown-marbled. 
a. In spirits. Adult. Affghanistan. Presented by the Hon. East 
India Company. 
