SNAKES. 107 



Serp. ii. 19. Ahhild. 112, t. 34. Bolyeria pseudoeryx, Gray^ Zool. 

 Misc. 46, 1842. 



Scales of the back six-sided, three-keeled. 



New Holland, Port Jackson, Peron. Mus. Paris. 



II. Tail very shorty not {or only slightly) prehensile. Head very 



small, indistinct. 



a. The head covered with scales; intermaxillary teeth and supra- 

 orbital bone wanting : scales convex : sub caudal 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, Fitz. N. Class. Rept. 1826. Constrictores pars, Oppell, Repi. 

 1811. Isodonta pars, Muller. Colubrini pars, Boie, 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 ; 



pupil ? ; 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 CusoRiA. 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. AflTghanistan. Presented by the Hon. East 

 India Company. 



