108 IGUANID.E, 
1. Basiliscus americanus. 
Basiliscus americanus, Gray, Cat. p. 192. 
Thysanodactylus bilineatus, Gray, J. ¢. p. 194. 
Lacerta basiliscus, Linn. S. NV. i. p. 866 . 
Basiliscus americanus, Laur. Syn. Rept. p. 50; Bocourt, Miss. Se. 
Mex., Rept. p. 127; Giinth. Biol. C.-Amer., Rept. p. 64. 
Iguana basiliscus, Latr. Rept. ii. p. 258. 
Basiliscus mitratus, Daud. Rept. iii. p. 310, pl. xlii.; Guér. Icon. R. 
A., Rept. pl. xi. fig. 2; Dum. & Bibr. iv. p. 181; Duvern. R. A., 
Rept. pl. xviii. fig. 1; Cope, Journ. Ac. Plulad, (2) viii. 1876, 
p. 125, pl. xxv. fig. 2. 
Ophryoessa bilineata, Gray, Zool. Beechey’s Voy. p. 94. 
Lophosaura goodridgii, Gray, Ann. § May. N. H. (2) x. 1852, p. 438 ; 
Richards. Zool. Herald, p. 143, pl. xxvi. 
Basilicus guttulatus, Cope, l. c. pp. 125, 156. 
goodiidgii, Cope, J. e. p. 125. 
Head-crest more or less regularly hood-shaped, rising from an 
imaginary line connecting the superior borders of the ear-openings, 
preceded by a more or less distinct keel to between the posterior 
borders of the orbits. Six or seven labials to below the centre of 
the eye. The three or four anterior chin-shields in contact with 
the infralabials. Dorsal crest much developed, sometimes quite as 
high as the body, supported by bony rays, covered with large thin 
scales. The lateral fringe of the toes very strongly developed. 
Caudal crest like the dorsal, though not quite so high. Ventral 
scales perfectly smooth. Olive-brown above, with more or less 
distinct angular black cross bars on the back ; a more or less distinct 
lighter band on the temple to the neck, and another, broader and 
more distinct, from the loreal region to the fore limb. 
Total length .......... 800 millim. 
PCA Gs ender aya tiie 60, 
Width of head ........ 35a, 
Body. iscastuasteea lena s 4 9% 180, 
Fore limb. ............ 95a, 
Hind limb ............ 205, 
Dall: vce dayase awh 560, 
Panama and Costa Rica; Martinique (?); Guianas (?). 
a,b. 3. Tropical America, 
ce. 3, stuffed. Tropical America. 
d. 3, stuffed. Costa Rica. F. D. Godman, Esq. [P. ]. 
e. Yg. Fernando de Noronha (?). H.M.S. ‘Chanticleer. 
(Type of Ophryoessa bilineata.) 
ft. Yg. P 
2. Basiliscus plumifrons. 
Basiliscus plumifrons, Cope, Journ. Ac. Philad. (2) viii. 1876, p. 125, 
pl. xxv. fig. 1. 
Head-crest consisting of a principal posterior portion and an 
