HERPETOLOGY OF PORTO RICO. 649 



Dlt)irtisions. 



mm. 



Total length 182 



Tip of snout to vent (56 



Vent to tip of tail 11(5 



Tip of snout to ear lU. 5 



Tip of snout to center of eye 13 



Width of head 13 



Fore leg 30 



Hind leg. . 45 



Female and yonng differ in the absence of dewlap and eervico-dor.sal 

 folds, the former also of postanal plates; the tail is more cjdindrie and 

 the spinous upper edge less ])ronounced. 



YaTiation. — As usual g-reiit variation is found in the size and conse- 

 quent number of the head scales. The supraorbital semicircles may 

 be in contact, though I have never seen more than one shield on each 

 side meeting, but just as often they are separated entirely by a single 

 series of scales. The supraorbitals again are separated from the 

 occipital usually l»y three, often by two, but very i-arely by four 

 scales. The loreal rows are mostly live, often four, more rarely six. 

 There are usually six supralabials anterior to the center of the eye, 

 sometimes only live, occasionally seven. The keeling and wrinkling 

 of the upper head shields and scales are also subject to consideral)le 

 variation, being usually less pronounced in youth. 



Citlors of living mvinial.—AdnU imiJe, U.8.N.M. No. 2686(3 (L. S. 

 No. 9026). Catalina plantation, a])Out 890 feet altitude; Fet)ruary 22, 

 1900. Iris, dark brown; eyelids, abruptly flesh-colored; general color, 

 bright emerald green without markings; a))domen, underside of hind 

 legs, and thick l)asal portion of tail below, pale glaucous green; ter- 

 minal third of tail, black, tip, pale; dewlap, gamboge yellow; scales, 

 pale yellow, no thickened edge. 



When handled the animal changed from green to wax-yellow with 

 numerous dusky spots and marblings on body and crossbars on tail, 

 as well as longitudinal dusky stripes on throat; when reassuming its 

 normal color the dusky markings disappeared before it turned green. 



Another specimen (No. 26855, L. S. No. 9022), from same locality, I 

 descril)ed as follows: General color, changing from bright parrot- 

 green to almost dusky olive yellow, with faint indications of l)rownish, 

 dusky mar))lings on back; terminal third of tail, blackish, extreme 

 end pale; belly, underside of thighs, and thii'k ])art of tail, verging 

 on pale glaucous green; throat and dewlap, wax-yellow; pinkish 

 edges to the eyelids; iris, very dark brown with a dark steel-blue 

 ring; inside of mouth, pale yellowish. 



An adnlt female (No. 26867), same locality, is described in the note- 

 book as like No. 26866, but with a very small dewlap not differentiated 

 as to color. No soft cervico-nuehal or dorsal crests. The male has a 



