HERPETOLOGY OV PORTO RICO. 653 



The dorsal folds, especially the one on the nape, very strongly 

 developed. 



Dimensions. 



linn. 



Total length 1 25 



Tip of snout to vent 44 



Vent to tip of tail 81 



Tip i if Bin nit to ear 13. 5 



Tip of snout to center of eye 9 



Width of head 8 



Fore leg 20 



Hind leg 34 



Female and young differ in the absence of dewlap and cervico-dorsal 



folds, the former also of postanal plates. 



Variation. — The variation in the head scutellation is as great as in 

 the allied species. Thus, while in the specimen described the supra- 

 orbital semicircles are completely separated by a row of scales, in many 

 others they are in contact, in some cases even extensively so, as, for 

 instance, in No. 25532, in which two pairs of the semicircle scales are 

 broadl} 7 in contact. In the large series before me they arc separated 

 in about one-half the specimens. In none is there more than one scale 

 row between the semicircles. The single large shield separating the 

 supraocular semicircle from the superciliary ridge just in front of the 

 supraocular granules is remarkably constant, it being divided in two 

 specimens only, namely, Nos. 26849 and 26990, and in these only on 

 one side. 



The keels on the scales covering the arms are often so feeble as to 

 appear entirely absent. 



Colors of living animal. — Adult male. U.S.N.M. No. 26807 (L. 

 Stejneger No. 9007). Pueblo Viejo, near San Juan, February 13, 

 1900. Iris dark brown; general color above light yellowish gray, 

 much lighter below; the saddle-shaped spots on back very pronounced 

 blackish brown bordered by whitish; on sides an irregular series of 

 burnt- umber brown spots, also with white margins; throat and adja- 

 cent portions of underside of neck of a delicate pale bluish green; 

 skin of the dewlap deep orange, the distant scales canary } T ellow, those 

 on anterior edge more whitish. 



Another male (No. 2*5865. L. S. No. 9027, Catalina plantation, Feb- 

 ruary 22, 1900). — General color above grayish drab, the saddle spots 

 blackish brown, and indefinite blotches and spots on sides cinnamon; 

 edge of eyelids pale yellowish; a pale semilunar stripe on keels of 

 suboculars; dewlap orange, the thickened edge pale greenish white; 

 otherwise as No. 26807. 



Habitat. — The saddle-spotted anolis is not exclusively Porto Rican 

 inasmuch as it is also an inhabitant of the Virgin Islands, specimens 

 being known from St, Thomas, Tortola, .Just v. Dyck, and Vieques. 



