HERPETOLOGY OF PORTO RICO. 583 



which Dumeril and Bibron published in 1841 as having' been given 

 previously by them to //. martinicensis in manuscript, and the two 

 names given by Fitzinger in 1843 to If. ricordii and //. lineatus. The 

 proper interpretation seems to be to regard Eleutherodactyliis as a 

 substitute name, especially when compared with Dumeril and Bibron's 

 note concerning L&pthyla on a previous page," and it is here adopted 

 accordingly. 



Elwttherodactyhis is a genus characteristic of tropical America, and 

 comprises a large number of species often difficult to distinguish. In 

 many respects they resemble the true tree toads, though structurally 

 they are nearer the frog-like Leptodactylus. 



Numerous species occur in the Antillean islands, five being found in 

 Porto Rico and dependent islands. 



KEY TO TnE SPECIES OF ELEUTHERODACTYLUS IN PORTO RICO. 



a l Belly granular; vomerine teeth in two short straight series not extending laterally 

 beyond the choanse (fig. 17). 

 h 1 Nostrils much nearer tip of snout than eye (fig. 15). 



c 1 Hind leg averages about one-half more than total length of head and body. 



E. auriculatus, p. 583. 

 c 2 Hind leg averages about one-third more than total length of head and body. 



E. antillensis, p. 591. 



b 2 Nostrils halfway between tip of snout and eye ( fig. 35) E. unicolor, p. 597. 



a 2 Belly smooth; vomerine teeth in two long angular series extending laterally 

 beyond the choanse (fig. 27). 

 l> ' Distance of vomerine teeth from choanae less than diameter of choanae (fig. 32) ; 

 soles of feet tubercular; hind foot nearly as long as fore leg; color of back 



and sides pale, spotted with blackish E. monensis, p. 595. 



6 2 Distance of vomerine teeth from choanee nearly twice the diameter of the 

 choame (fig. 27); soles of feet perfectly smooth; hind foot longer than fore 

 leg; color above uniform brown with a pale longitudinal band on each side 

 of back, sides blackish E. richmondi, p. 593. 



ELEUTHERODACTYLUS AURICULATUS ^ (Cope). 



1862. Hylodes auriculatus Cope, Proc. Phila. Acad., 1862, p. 152 (type locality, 

 Eastern Cuba; type No. 5207 U.S.N.M.). — Boulenger, Cat. Batr. Sal. 

 Brit, Mus., 1882, p. 214 (Santo Domingo). 



1876. Hylodes martinicensis Peters, Mon. Ber. Berlin Akad. Wiss., 1876, p. 709, 

 pi. i (Porto Rico) (not of Tschudi). — Gundlach, Anal. Soc. Espan. 

 Hist. Nat,, X, 1881, p. 315 (Porto Rico). — Stahl, Fauna Puerto-Rico, 

 1882, pp. 71, 161 (Porto Rico).— Garman, Bull. Essex Inst,, XIX, 1887, 

 p. 13 (part: Bayamon, Porto Rico). — Boettger, Kat. Batr. Mus. Senck- 

 enberg., 1892, p. 29 (Porto Rico). 



The identity of the tree toad of Porto Rico has been a matter of 

 great uncertainty. Peters, who compared Porto Rican specimens 

 with the type of Hylodes iimrtinicensis from Martinique, declares 

 them to be identical; and Garman, who also had before him specimens 

 from both localities, came to the same result. 



«Erpet. Cen., VIII, p. 504. ^ Auriculaliis^= with small ears. 



