35, IGUANA. 189 
San Domingo, Navasa. 
a3. —? Zoological Society. 
6. 2, stuffed. —-?P Zoological Society. 
ce, Skeleton of b. 
35. IGUANA. 
Iguana, part., Laur. Syn. Rept. p. 47; Daud. Rept. iii. p. 358; 
Fitzing. N. Classif. Rept. p.17; Wiegm. Herp. Mex. p. 16. 
Iguana, Gray, Ann. Phil. (2) x. 1825, p.197 ; Dum. § Bibr. iv. p.199; 
Gray, Cat. Liz. p. 186; Bocourt, Miss. Sc. Mex., Rept. p. 133. 
Hypsilophus, Wagler, Syst. Amph. p. 147; Fitzing. Syst. Rept. 
54. 
p. 54. 
Amblyrhynchus (non Bell), Wagi. 1. e. p. 148. 
Tympanum distinct. Body compressed; a dorsal crest; dorsal 
scales small. Upper head-scales large. A transverse gular fold, 
and a large non-dilatable gular appendage. Digits compressed, with 
keeled lamelle inferiorly. A long series of femoral pores. Tail long, 
compressed. Lateral teeth denticulated; pterygoid teeth. A small 
sternal fontanelle. One or two poststernal ribs, 
Tropical America. 
1. Iguana tuberculata. 
Iguana tuberculata, Gray, Cat. p. 186. 
Iguana tuberculata, Laur. Syn. Rept. p.49; Dum. § Bibr. iv. p. 203; 
A. Dum. Arch. Mus, viii. p. 526. 
Lacerta iguana, Shaw, Zool. iti. p.199; Duvern. R.A, Rept. pl. xvii. 
Iguana delicatissima (non Lawr.), Daud. Rept. iii. p. 263, pl. xl. 
cerulea, Daud. 1. c, p. 286; Spix, Spec. Nov. Lacert. Bras. p.7, 
1, vii. 
: sapidissima, Merr. Tent. p. 47. 
—— squamosa, Sprz, lc. p. 5, pl. v. 
viridis, Spzx, . ¢. p. 6, pl. vi. 
—— emarginata, Spiz, 1. c. p. 7, pl. viii. 
lophyroides, Sprx, 1. ¢. p. 8, pl. ix. 
Hypsilophus iguana, Wagl. Syst, Amph. p. 147. 
Head moderately large; snout rounded, with obtuse canthus ros- 
tralis ; nostril rather large, pierced in a swollen nasal, near the tip 
of the snout; tympanum large, oval; head-scales smooth, variable 
in shape, large on the forehead and between the orbits; the inter- 
orbital series either in contact or separated; supraocular scales 
small; occipital enlarged ; rostral large, pentagonal, mental smaller ; 
ten to twelve labials. Anterior border of the gular appendage with 
a crest of large triangular compressed scales; gular scales very 
small on the appendage, larger and in several rows on the sides near 
the labials, increasing in size towards a large circular shield situated 
below the tympanum. Dorso-nuchal crest continuous, composed of 
falciform lobes, the length of which varies considerably ; most de- 
veloped in the full-grown males. Dorsal scales very small, equal, 
keeled; neck with scattered large conical or obtusely keeled 
