THE HERPETOLOGY OF HISPANIOLA 161 



one row of very small granules, which in front of the disk form a patch 

 of gradually enlarging granules; can thus rostralis sharp, consisting of 

 three elongated shields of which the middle one is slightly the longer; 

 superciliary ridge consisting of one elongate scale followed by a very 

 small one, this in turn being followed behind by a double row of 

 differentiated scales larger than the granules above and below them; 

 loreal rows six; subocular semicircles keeled, not in contact with the 

 supralabials ; supralabials 10, the seventh under the center of the eye, 

 the following ones increasingly smaller; temporal granules about the 

 size of the dorsolaterals; a well-marked double series of small scales 

 forming the supratemporal line; dorsal and lateral granules minute, 

 tubercular; a median enlarged series of scales down the center of the 

 back beginning on the nuchal region, diminishing slightly on the sac- 

 rum and continuing on the tail as a low, serrate ridge; ventral scales 

 relatively large, imbricate, rounded behind, smooth, those on the 

 throat very small and bluntly tuberculate; anterior face of forelegs and 

 hindlegs covered with large keeled scales about the same size as the 

 ventrals; scales covering hands and feet above unicarinate to multi- 

 carinate; digital expansion wide, with about 20 lamellae under the 

 second and third phalanges of the fourth toe, 32 under the entire toe ; 

 tail short, compressed, with well-marked verticils of somewhat en- 

 larged rectangular scales, those between being pointed and smaller, 

 in about eight vertical, somewhat irregular series, all imbricate, not 

 keeled, surmounted by a strongly serrate edge of enlarged scales, 

 triangular in profile, three to every verticil, the last one enlarged 

 slightly; deAvlap naked, with many close-set series of rather small, 

 weakly multicarinate or entirely smooth scales, edge thickened and 

 set with larger scales; postanal plates slightly developed; a skin fold 

 on the neck and back. 



Dimensions: Snout to vent, 67 mm.; tail, 112 mm; orbit to tip of 

 snout, 10 mm.; orbit to orbit, 9 mm.; snout to posterior ear, 23 mm.; 

 snout to center of eye, 13 mm. ; width of head, 15 mm. ; foreleg, 32 mm. ; 

 hindleg, 59 mm; tibia, 18 mm. 



Color (in alcohol) : Above sepia, suffused on head and back with 

 dull heliotrope-purple, lower parts olive-buff, darker on the tail; all 

 the ventral scales including those of dewlap very finely punctate with 

 minute black dots. 



Variations. — In the 375 examples of this species now in the National 

 collection almost every possible variation exists. Some of the speci- 

 mens have heavy keels on the ventral plates; in others from precisely 

 the same locality taken at the same time the ventrals are perfectly 

 smooth. The loreal rows vary all the way from 4 to 10 in number. 

 The supraorbital semicircles may be broadly in contact or widely 

 separated. The scales on the snout may be very small or unusually 

 large, the two extremes well shown in the Petionville specimens, 



