HEEPETOLOGY OF POKTO RICO. 635 



upper edg-e l)eino- live; dewlap moderate with distant series of keeled 

 scales, anterior edge thickened; postanal shields slig-htly developed. 



When in attect tlie skin on the median line of the neck and back is 

 raised up so as to from a high crest of rounded outline and deeply 

 notched over the shoulder nuich after the fashion of Anolis hnujl^ as 



shown in the frontispiece. 



Duttendons. 



mm. 



Total length 200 



Tip of suont to vent 68 



Vent to tip of tail 132 



Tip of snout to ear 20 



Width of head 12 



Fore leg 35 



Hind leg 58 



T\\e female difl'ers chiefl}^ in the absence of dewlap, tin to the tail, 

 and postanal plates. The tail is nearly eydindric, the median series of 

 scales above being only slig-htly enlarged and forming a scarcely 

 appreciable serration. The full-grown female appears to be consid- 

 erabl}^ smaller than the male, one (No. 27270) distended with large eggs 

 measuring only 42 mm. from snout to vent. One of the eggs meas- 

 ures 11 by 5 mm. 



Variation. — The greatest variation is found in the size of the occip- 

 ital and the scales which separate the latter from the supraocular 

 semicircle, the number of rows sometimes being as low as five. These 

 scales are alwa3^s small, almost granular, and their increased number 

 appears to be at the expense of the occipital, which is sometimes quite 

 small and difficult to distinguish. In exceptional cases the median 

 row of small scales between the larger ones separating the supraocular 

 semirings is absent, in which case there are only two rows. The 

 number of polygonal scales composing the supraocular disk is also 

 very variable, there being often as many as 17 or 18. In some speci- 

 mens, especially younger ones, the ventrals are less sharply keeled 

 than in others. 



Color of living specimens.— Adult male; No. 26903, U.S.N.M. 

 (L. S. No. 9031); Camp El Yunque, 2,863 feet altitude; February 25, 

 1900. General color dark olive above, with live wide lateral nearly 

 black cross bands, Avhich barely meet on the median line, while on the 

 sides they are very close together, being only separated by an oblique 

 series of small yellowish spots; a wide postocular blackish-brown band 

 passes above the ear and joins its fellow of the other side on the l)ack 

 of the neck; top of head densely marbled with indistinct spots of 

 brown edged with dusk}^; edge of eyelids, semicircular line formed 

 by the keels of the suboculars, as well as alternating spots on the 

 supralabial sutures lemon-yellow; underside dull olive-^^ellow, chin 

 bright lemon-yellow, the entire under surface densely marbled with 

 blackish; underside of lim})s similar, but paler; limbs above cross- 

 barred olive and blackish, like l)ack; tail similarly crossbarred, but 



