180 IGUANIDE. 
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. 
millim, millim 
Total length........ 297 Fore limb ...... 50 
Head) svaaiasavexs 22 Hind limb ...... 75 
Width of head ...... 18 SPAM. tect sing te.ee, 8% 205 
Bodyeiereigvesds os 70 
South America. 
a-b. So. Demerara Falls. F 
e. Yg. Pernambuco. J.P. Smith, Esq. [P.]. 
ao. Interior of Brazil. 
eo. "Brazil. 
f. Q. Sarayacu, Ecuador. Mr. Buckley rie 
g-k. 3,2, & her. Moyobamba, Peru. Mr. A. H. Roff [C.]. 
im o. South America. 
2. Uraniscodon plica. 
Plica umbra, Gray, Cat, p. 223. 
Lacerta plica, Zinn. 8. N. i. p. 367, 
Iguana chalcidica, Law. Syn. Rept. p. 48. 
Agama umbra, Daud. Rept. iii. p. 875. 
plica, Merr. Tent. p. 55. 
ee panthera, Spix, Spec. Nov. Lacert. Bras. p, 11, pl. xiii. 
fi 
Ureniaendon plica, Kaup, Isis, 1826, p. 91. 
Lophyrus agamoides, Gray, Phil. Mag. (2) ii. 1827, p. 208. 
Hypsibatus plica, Wagl. Syst. Amph. p. 150. 
Ophyessa plica, Gray, Grif. A. K. ix. Syn. p. 41, pl. —. 
Hypsibaius agamoides, Wiegm. Herp. Mex. p. 15; Dum. & Bibr. iv. 
. 254. 
? Hypsibatus punctatus, Dum. § Bibr. p. 258. 
? Ptychosaurus punctatus, Pitzing. Syst. Rept. p. 59. 
Ptychosaurus (Ptychopleura) plica, Fitzing. 1. c. 
Hypsibatus panthera, Peters, Mon, Berl. Ac. 1877, pp. 408, 413. 
Head large, short snout ; nostril latero-superior ; supraciliary 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 pouched inferiorly ; 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-hike 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 spinose 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 
