ADDENDUM. 473 



ADDENDUM. 



Page 117. Add a new species : — 



7. Enyalioides leechii. 



In habit verj' similar to Eivjrdins catenatus, but the digits strongly 

 keeled and pectinate inferiorly and distinctly denticulated laterally. 

 Nostril below the canthus rostralis, much nearer the end of the snout 

 than the orbit. Upper head-scales small, equal, strongly keeled ; 

 occipital a little enlarged ; a few longitudinal rows of strongly 

 keeled supraoculars, smaller than the scales on the vertex, surrounded 

 by smaller granular ones ; twelve or thirteen upper and eleven lower 

 labials. Gular scales small, granular, obtusely keeled. Dorso-nuchal 

 crest quite indistinct (anomalous?). Dorsal scales small, granular, 

 keeled, laterals smaller still, obtusely keeled ; ventrals much larger, 

 squarish subrhomboidal, very strongly keeled. Limbs long, covered 

 with equal strongly keeled scales, the hind side of the thighs finely gra- 

 nulate ; the adpressed hind limb reaches beyond the end of the snout ; 

 the length of the tibia equals the distance between the end of the snout 

 and the gular fold. Tail scarcely compressed, not crested, covered 

 with subequal keeled scales, which are largest inferiorly ; its length 

 about once and two thirds that of head and body. Chestnut-brown 

 above ; a black line from the eye to the fore limb, passing on the 

 lower border of the tympanum ; a short yellowish streak on each 

 side of the nape ; a triangular yellowish spot, pointing towards its 

 fellow, above each shoulder ; limbs with rather indistinct darker 

 and lighter cross bands ; lower surfaces brownish ; an oblique arrow- 

 headed dark-brown marking on each side of the throat ; tail with a 

 series of large, elliptical, longitudinal, blackish spots above and 

 inferiorly, some confluent and forming rings. 



Upper Amazons. 

 a. $ . Santarem. J. II. Leech, Esq. [C.]. 



VOL. II. U I 



