HERPETOLOGY OF PORTO RICO. 615 



ing to tho inner and outer metatarsals; fifth (outer toe)extending as far 

 as the first (inner); tail covered with keeled scales in rings, the scales 

 being straight and the keels nearly parallel with the sides of the scales; 

 about forty -three scales in the fifteenth ring from the base. 



Dimensions. 



mm. 



Total length ( tip of tail reproduced ) 310 



Snout to vent 108 



Tail (tip reproduced) 202 



Snout to ear 26 



Width of head 16 



Fore leg from axilla 39 



Hind leg from groin 77 



Outer toe without claw 11 



Inner toe without claw 6 



These dimensions are only those of a medium-sized individual. The 

 largest specimen in our collection (No. 25570, from Ca}^o Santiago, off 

 the Playa de Humacao) measures to the vent 160 mm. and to the tip 

 of the tail 470 mm., but I am sure that some of the specimens of 

 apparently patriarchal age which I saw in the city of San Juan near 

 the quartermaster's wharf were considerably larger. 



Coloration of living specimens. — Adult; U.S.N.M. No. 27146; L. 

 Stejneger No. 9057; Arecibo, April 3, 1900. — Ground color above of 

 old skin (the specimen was shedding) "pea green," of new skin more 

 olive green, the difference being slight, however; underside pale 

 "pearl gray" with a decided wash of "turquoise blue" on the groin 

 and tail; dark markings blackish; eyelids edged with whitish; iris 

 very dark brown. 



A somewhat larger specimen (male), U.S.N.M. No. 27221; L. Stej- 

 neger No. 9065; Utuado, April 7, 1900, had the ground color above 

 tawny olive becoming olive gray on the tail; head not colored differ- 

 ently from back; lower back with a broken network of black meshes; 

 flanks with a series of vertical black spots on a slightly browner ground 

 alternating with a double or triple series of pale dots, which continue 

 indistinctly on hind legs and sides of tail; tip of snout and of lower 

 jaw pink flesh color; sides of head pale drab; underside whitish with 

 a bluish cast, which is strongest on the sides and under hind legs and 

 tail. 



A specimen (young) (No. 27222; L. Stejneger No. 9066) from the 

 same locality as the last had head and neck uniform tawny olive; 

 ground color of back similar, but becoming duller toward the tail, 

 which is drab above; ground color of flanks similar, though more rus- 

 set nearer the light lateral line, especially anteriorly; sides of head 

 and neck nearly uniform pale cinnamon; a narrow pale cream-buff line 

 from superciliaries slightly broadening on the back and fading out at 

 about the posterior third of the back, margined with blackish on both 



