IGUANID^. 21 



as long as broad ; snout depressed, twice as long as the dis- 

 tance from orbit to ear ; forehead and occiput deeply con- 

 cave ; frontal ridges distinct, having the appearance of di- 

 viding into two or three anteriorly ; a few only of the upper 

 head scales keeled ; scales of the supraorbital semicircles 

 large, not separated between the orbits ; eight to twelve 

 enlarged, smooth to feebly keeled supraocular scales, iu 

 contact with or separated from the supraorbitals, by a sin- 

 gle series ; occipital about twice as large as the ear open- 

 ing, in contact with the supraorbitals ; rostral canthus not 

 prominent, of five scales ; loreal rows four to five ; six to 

 seven labials to below the centre of the eye ; ear opening 

 small, twice as high as long. On large specimens the su- 

 praorbital ridges become very prominent and continued 

 backward enclose a cup-shaped depression on the occiput ; 

 the parietal granules are greatly enlarged. A couple of 

 rows of much enlaro^ed granules extend back from the 

 orbit and bend down toward the ear. Gular appendage 

 moderate, smooth scaled. Body hardly compressed, dorso- 

 nuchal fold indistinct, marked by a couple of rows of en- 

 larged keeled scales. Dorsal scales small, very irregular 

 in sizes, six or eight rows of the vertebrals enlarged and 

 keeled, those on the flank smaller. Ventrals larger, sub- 

 hexagonal, juxtaposed, smooth. Limbs medium ; ad- 

 pressed, the hind leg reaches a little in front of the ear; 

 digital expansions moderate ; lamellae under phalanges ii 

 and iii of the fourth toe about twenty-seven. Tail feebly 

 compressed, nearly twice as long as head and body, ser- 

 rated on the upper edge with low subequal strongly keeled 

 scales. No enlarged post-anal scales. 



Grayish to brownish olive, with or without faint trans- 

 verse bands of brown on the anterior portion of the body 

 and on the tail ; more blue on the flanks and beneath ; head 

 darker. On back and flanks there are indistinct traces of 



