166 THE HERPETOLOGY OF CUBA. 
strictly terrestrial and feeds principally on ants although it will rarely climb 
even into the lowest bush or upon the stalks of grass to secure its prey; on one 
occasion the junior author saw one climb about eighteen inches into a small 
malvaceous bush at Guantanamo. The structure of its feet with the sharp 
projecting lateral scales marks a transition stage toward the condition seen in 
such genera as Uma, among iguanids or the South African Ptenopus among 
geckonids. 
44. CyYCLURA MACLEAYI Gray. 
Plate 11, fig. 2, 3. 
Iguana. 
Diagnosis: — The largest Cuban land reptile, an enormous lizard with 
prominent gular pouch, a nuchal and dorsal crest of spines and a powerful 
muscular tail armed with prominent whorls of heavily keeled scales. 
Description: — Adult #@ M. C. Z. 11,050. Cuba: Pinar del Rio; Valley 
of Luis Lazo, April, 1915. Carlos de la Torre and Thomas Barbour. 
Rostral as wide as the mental, broadly in contact with nasals; nasal large, 
somewhat pentagonal, perforated by a large ovoid nostril; each nasal in contact 
with a large, elongate supranasal and a squarish postnasal; nasals and supra- 
nasals broadly in contact on the middle of the snout; the pair of supranasals 
immediately followed by two pair of large prefrontals, the posterior pair several 
times as large as the anterior pair; both pairs of prefrontals broadly in contact 
in the middle line of the snout; a few granules on the crossing point of the two 
prefrontal sutures; all these scutes covering the upper surface of the snout 
slightly swollen and convex; between prefrontals and the scarcely indicated 
supraocular semicircular two irregular rows of scales, the anterior row formed 
of scales several times as large as those in the posterior one; immediately fol- 
lowing the posterior row a large rounded median scale; supraorbital semicircle 
differentiated from the supraocular dise but the scales on the outer and anterior 
portion of the supraocular region smaller than the others; semicircles separated 
by two, partly by three rows of large scales; occipital located with its posterior 
end on a line with the posterior end of the semicircle; scales of the occipital 
region enlarged and swollen, the outer ones largest; about two rows of scales 
between the occipital and the semicircles; two or three rows of superciliary 
shields not clearly differentiated, canthus rostralis consisting of three large 
scales, the first elongate and in contact with two supraciliary scales that are also 
elongate; all of these scales on the top of the head swollen, slightly keeled, and, 
