98 IGtIANIDJE. 



6. POLYCHRUS. 



Polychrus, Cuv. B. A. ii. p. 40 ; Merrem. Tent. p. 48 ; Fitzing. N. 



Chissif. Eept. p. 17; Wagl. Syst. Amph. p. 149; Wiegm. Herp. 



Mex. p. 16; Diim. 8f Bib?-, iv. p. 63; Fitzwg. Si/st. Re^^t. p. 62j 



Gray, Cat. Liz. p. 183 ; Bocowt, Miss. Sc. Mex., Rept. p. 111. 

 Ecphymotes, part., Fitzing. N. Classif. Itept. p. 17 ; Gray, I. c. 



p. 184. 

 Lfemanctus, part., Dwn. %■ Bihr. iv. p. 70. 

 Ecpliymatotes, Fitzing. Syst. JRejit. p. 62. 

 Spliperops, Gray, I. c. p. 183. 

 Ecpbymotes, part.. Gray, I. c. p. 184. 

 Chaunolsemus, Peters, Mon. Berl. Ac. 1869, p. 786. 



Tympanum distinct. Body compressed, covered "with small scales ; 

 no nuchal or dorsal crest. Head witli enlarged scales. No trans- 

 verse gular fold ; male with a small gular pouch. Digits compressed, 

 with earinated lamellae inferiorly ; four large scales at the base of 

 the claw ; third and fourth toes equal. Femoral pores present. 

 Tail very long, round. Lateral teeth tricuspid ; pterygoid teeth. 

 No sterna] fontanelle. Abdominal ribs. 



Tropical America. 



Synopsis of the Species. 



Ventral scales uuicarinate ; a serrated 



ridge in front of the throat 1. marmoratus, p. 98. 



Ventral scales uuicarinate ; lateral scales 



larger than median dorsals 2. acutirostris, p. 99, 



Ventral scales multicarinate, smaller than 



the gulars 3. gutturosus, p. 100, 



1. Polychrus marmoratus. 



Polychrus marmoratus, Gray, Cat. p. 183, 

 Lacerta marmorata, Linn. S. N, i. p. 308. 

 Iguana marmorata, Latr. Rcpt. i. p. 265. 

 Agama marmorata, Daud. Rept. iii. p. 433. 

 Polychrus marmoratus, Merr. Tent. p. 48 ; Spix, Spec. Nov. Lacert. 



p. 14, pi. xiv. ; Gtter. Leon. R. A., Rept. pi. xi. fig. 3 ; Wied, Beitr. 



p, 110, and Ahhild. ; Dum. 8f Bibr. p. 65 ; Bocourt, Miss. Sc. Mex., 



Rept. pi. xvii. fig. 6. 



virescens, ( Wied) IVagler, Leon. A7nj)h, pi. xii. 



strigiveutris, Wagl. I. c. 



Snout obtusely pointed ; nostril equally distant from the orbit and 

 the tip of the snout ; eye-opening small, smaller than the tympanum ; 

 upper head-scales smooth or feebly granulate or striated, very large 

 on the snout ; regular supraorbital semicircles of large scales, separated 

 by one row of scales ; supraocular scales small ; labials large, few ; 

 mental with a median cleft posteriorly, Gular scales smooth or 

 feebly keeled, smaller than ventrals, separated by granules on the 

 gular pouch ; a median denticulation along the front half of the 



