Dr. J. E. Gray on the Amphisbcmians. 371 



Cynisca leucura, Gray, I. c. 71. 

 Amphisbcena leucura, Dum. et Bibr. Erp. Gen. v. 498. 

 A. macrura, Schlegel, Mus. Leyden. 

 Brown ; end of tail white. 



Hab. Guinea (^Mus. Leyden) (not Guiana, as stated by mistake in 

 the Catalogue). 



b. Nasal shields small, separate above, on the side of a large swollen 

 rostral shield. 



Bronia. 

 Head ovate, rather convex ; rostral shield very large, liemisphe- 

 rical, with the small nasal shields inserted in notches on its hinder 

 edge, which is placed over tlie front labial ; crown convex, rounded 

 on the side, covered with two pairs of shields ; the front pair square, 

 the hinder smaller, triangular, with a small triangular occipital shield 

 on its outer side ; eye-shield triangular ; labial shields ^^, the 

 second upper and front lower large ; gular shield single, square, with 

 a cross series of shields behind it. Body cylindrical ; lateral line 

 well marked ; the dorsal shields elongate, narrow ; the ventral ones 

 rather broader, smooth ; preanal pores four ; the preanal shields six or 

 eight, the central pair largest, the lateral ones very small. Tail blunt. 



Bronia brasiliana. 



Pale brown; dorsal shields with a dark central spot. 



Hah. Tropical America; Santarem, on the Amazons {Bates, B.M.). 



Fig. 2. Fig. 1. 



Bronia braziliana. 



C. Lateral and dorsal lines not defined, or the lateral line only 

 visible on the hinder part of the body ; rostral shield small; 

 nasal shields far apart, small, placed on the side of the high 

 rostral. 



Sarea, Gray, Cat. Tort., &c., B. M. 71, 1844. 



Head conical ; rostral narrow, higher than broad, rounded in 

 front, placed behind the triangular nasal ; crown with two pairs of 

 shields, the front largest, elongate, the hinder trigonal ; eye-shield 

 triangular ; the labial shields g^| ; the second upper and lower labial 

 shields very large, the others smaller ; with one large gular plate. 



25* 



