112 IGT7ANID.E. 



laterally ; in the young the digital fringe is almost as much deve- 

 loped as in Basilisciis. Tail strongly compressed, crested like the 

 back ; its length about twice that of head and body ; caudal scales 

 subequal, keeled, the lower larger. Brownish above, uniform or 

 spotted with darker ; frecjuently a light festooned band from axilla 

 to groin ; lower surfaces brownish white. 



Total length 450 millim. 



Head 30 „ 



Width of head 24 „ 



Body 110 „ 



Fore limb 63 ,, 



Hind Umb 110 „ 



TaU 310 „ 



Guianas ; Brazil. 



a~b. c? . Demerara Falls. 



e. 2. Vrybeids Lust, Demerara. Rev. W. T. Turner [C.J. 



d. S • Surinam. Mr. E. Bartlett [C.]. 



e, f. (S . Surinam. 

 g, h. S and yg. Brazil. 



i. Ad., stuffed. ? 



11. ENYALIOIDES. 



Tympanum distinct. Body compressed ; a dorsal crest ; dorsal 

 scales small. A transverse gular fold ; a more or less developed 

 gular sac in the male. Digits compressed, with sharply -keeled 

 lamellae inferiorly. Males with a few femoral pores *. Tail long, 

 compressed. Lateral teeth tricuspid ; pterygoid teeth. No sternal 

 fontanelle. Abdominal ribs. 



Yeragua to Peru. 



Synopsis of the Species. 



I. Caudal scales subequal, not forming regular segments ; dorsal 



scales equal. 

 Ventralscales smooth or indistinctly keeled ; 



tail feebly compressed, not crested .. 1. Iatice2^s, -p. 113. 



II. Tail with rings of larger scales ; dorsal scales unequal. 



A. Dorsal and nuchal crests continuous ; supraciliary edge 

 simple. 



Ventral scales smooth or very feebly 



keeled; scales on the sides scarcely 



intermixed with larger ones 2. prtestahilis, p. 113. 



Ventral scales keeled ; two longitudinal 



series of larger scales on each side of 



the back 3. heterolejpis, p. 114. 



Ventral scales sharply keeled ; a single 



series of larger scales on each side ; 



* Except in E. palpebralis. 



