180 - IGUANIDiE. 



extending across the nape ; frequently a large yellowish spot on the 

 side of the neck, in front of the black band ; lower surfaces brownish 

 or yellowish, uniform or clouded with brown. 



inillim. millim. 



Total length 2!J7 Fore limb 50 



Head 22 Hind limb 75 



Width of head 18 Tail 205 



Body 70 



South America. 



a-h. (S . Demerava Falls. 



c. Yg. Peruambuco. J. P. Smith, Esq. [P.]. 



d. S . Interiur of Brazil. 



e. (S • Brazil. 



f. $ . Sarayacu, Ecuador. Mr, Buckley [CI. 

 \j-k. c?, 2 , & hgr. Moyobamba, Peru. Mr. A. II. Roft"[C.]. 

 /, ?«. (f. South America. 



2. Uraniscodon plica. 



Plica umbra, Gray, Cat. p. 223. 

 Lacerta plica, Linn. S. N. i. p. 307. 

 Iguana chalcidica, Laur. Si/n. Rcpt. p. 48. 

 Agama uiubra, Daud. Hept. iii. p. 375. 



plica, Merr. Tent. p. 55. 



Lophyrus panthera, Spi.v, Spec. Nov. Lacert. Bras. p. 11, pi. xiii. 



tig.^ 1. _ 



Uraniscodon plica, Kaup, Isis, 1826, p. 91. 

 Lophyrus agamoides, Grai/, Phil. May. (2) ii. 1827, p. 208. 

 Hypsibatus plica, Wagl. St/st. Amph. p. 150, 

 Ophyessa plica. Gray, Griff. A. K. ix. Sijn. p. 41, pi. — , 

 Hypsibatus agamoides, JViegm. Herp. Mex. p. 15; Dam. 4' Bibr. iv. 



p. 254. 

 ? Hypsibatus punctatus, Dum. S,- Bibr. p, 258. 

 ? Ptycliosaurus punctatus, Fifzing. Syst. Rept. p. 59. 

 Ptychosaurus (Ptychopleura) plica, Fitzing. 1. c. 

 Hypsibatus panthera, Peters, Man. Berl. Ac. 1877, pp. 403, 413. 



H'ad large, short snout ; nostril latoro-superior ; snpraeiliary edge 

 projecting, angular ; upper head-scales imbricate, more or less di- 

 stinctly keeled ; a series of large transverse supraoculars ; occipital 

 a little broader than long, narrower than the supraocular region ; 

 labials large, four or five upper and five or six lower. Neck con- 

 stricted and strongly plicate and jx)uched interiorly ; posterior gular 

 fold continuous with a lateral fold curving above the shoulder and 

 ending above the hind limb ; sides of neck with tufts of small, erect 

 spine-like scales, A small dorsal crest, highest on the nape. Body 

 depressed. Dorsal and lateral scales very small, strongly keeled ; 

 latero-dorsal fold covered with small erect spiuose scales ; a second 

 more or less distinct fold on each side from axilla to groin : ventral 

 scales a little larger than dorsals, smooth. The adpressed hind limb 

 reaches the eye or the tip of the snout. Tail slender, a little com- 

 pressed, with serrated upper ridge ; its length twice or a little less 



