10 IGUANIDH, 
2. Xiphocercus heterodermus. 
Anolis heterodermus, A. Duin. Cat. Méth. Rept. p. 59, and Arch. 
Mus. viii. p. 516, pl. xix. fig. 4. 
Head large, nearly twice as long as broad, nearly twice as long 
as the tibia; forehead concave, covered with large, irregular, smooth 
or slightly tectiform shields ; shields of the supraorbital semicircles 
in contact between the orbits, or separated by two rows of scales ; 
parietal and squamosal bones forming slight ridges, with series of 
enlarged shields ; occipital scale much longer than broad, much larger 
than the ear-opening, in contact with the supraorbital shields or 
separated by one series of scales ; one or two large smooth supra- 
ocular scales, separated from the supraorbitals by one row of granules; 
canthus rostralis angular, canthal scales extremely large, four; nine 
upper labials to below the centre of the eye; ear-opening very small. 
Gular appendage rather small, with longitudinal series of scales; gular 
scales smooth ; a series of large square shields on each side, close to 
and much larger than the infralabials. Body strongly compressed, 
with a slight dorso-nuchal denticulation or crest; dorsal and lateral 
scales flat, smooth, roundish, widely separated by smaller round 
scales of irregular size; ventral scales hexagonal or squarish, smooth, 
strongly imbricate. Limbs rather short; the adpressed hind limb 
reaches the axilla; twenty lamelle under phalanges 1. aud 111. of 
the fourth toe. Tail strongly compressed, with a slight crest or 
denticulation above, covered with rather large keeled scales, the 
keels forming straight longitudinal continuous lines; its length does 
not much exceed that of head and body. Male with strongly en- 
larged postanal scales. Olive above, some of the larger scales and 
a band from the loreal region to the fore limb yellowish white ; 
belly pale olive, brown-spotted. 
Total length .......... 160 millim., 
ead ed seis eee eee 7 
Width of head ........ Ts Spa 
BOO sree Socevtedenn ares 9 44, 
Fore dim a ence nieces 25° sy 
Hind limb............ 33 C(«,, 
TDUD La ax avai eyiia (our Selae 10° 4 
Tail . DD) 5 
Colombia. 
a-b. S Bogota. 
Pe, Skin, not good state, from 
snout to vent 100 millim. 
