152 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



twice as wide, roughly egg-shaped, in contact with the supraorbital 

 semicircles on one side and separated by a single small scale on the 

 other; supraocular disc composed of three large scales on the inner 

 border and three to iour smaller ones on the outer border, separated 

 from the semicircles by one or two rows of very small scales. A 

 cluster of three small scales forming the anterior margin of the super- 

 ciliary, of these the posterior very much longer and narrower than the 

 others; these scales continuous with the can thus rostralis which 

 extends about halfway across the loreal region; the can thus rostralis 

 formed of a single enlarged scale, but anterior to this are three scales 

 belonging to the same series; scales of this series greatly diminishing 

 in size anteriorly; loreal rows four. Scales of the subocular semicircle 

 feebly keeled or slightly tubercular, three of the central scales of this 

 series in broad contact with the supralabials; supralabials eight or 

 nine, but the last scale which lies behind the midpoint of the eye is 



c 



Figure SO.—Anolis distichus altavelensis: a, Top of head; b, profile of head; c, side of tail; 

 d, middorsal granules. A.M.N.H. No. 51045, paratype, from Alta Vela Island, Dominican 

 Republic. Twice natural size. 



smaller than the anterior supralabials. Temporal granules approxi- 

 mately the same size as the dorsals except for those in the midline 

 of the back; temporals gradually increasing in size toward the occipital 

 and toward the supratemporals which form a double row of large 

 scales extending from above the ear to the border of the orbit. Back 

 and sides covered with small, slightly tubercular granules; those of 

 the midline of the back being slightly larger than the others. Ventral 

 surface covered with large smooth imbricate scales; each scale ovoid 

 and three to four times as large as the dorsal granules ; throat covered 

 with flat granules slightly larger than the scales on the abdomen; 

 fore limbs covered with small smooth scales except for the anterior 

 margin of the forearm which is covered with a row of scales slightly 

 larger than the largest scales of the dewlap; anterior scales of femur 

 and tibia smooth, similarly enlarged, gradually diminishing in size 

 on the dorsal and ventral surface of the appendage; scales covering 

 hands and feet above enlarged, perfectly smooth. Digital expansions 

 moderate, about sixteen lamellae under second and third phalanges 

 of fourth toe, about twenty-seven under the whole toe. Tail slightly 

 compressed with barely defined verticils, the limits of each being 



