10 



IGUANID^. 



2. Xiphocercus heterodermus. 



Anolis heterodermus, A, Dam. Cat. Meth. Hept. p. o'.\ and Arch. 

 Mus. viii. p. 516, pi. xix. fig. 4. 



Head large, iiearlj- twice as long as broad, nearly twice as long 

 as the tibia ; forehead concave, covered with large, irregular, smooth 

 or slightlj' 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 lamcllte under phalanges ii. and in. 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. 



Head 21 „ 



Width of head 11 „ 



Body. 44 „ 



Fore limb 25 



Hind limb 33 



Tibia 10 



Tail 95 



5i 



Colombia. 



a-b. d • Bogota. 



? c. Skin, not good state, fi-oni ? 



snout to vent 100 millim. 



