598 REPORT OF NATIONAL MUSEUM, 1902. 



eyes to the tip; nostrils situated about halfway between eyes and tip of 

 snout, their distance from the eyes one-half the diameter of the eye; 

 upper eyelids as wide as interorbital space; tympanum small, about 

 one-third the diameter of the eye and distant from the latter more than 

 its own diameter; fingers with exceedingly small disks, first slightty 

 shorter than second; disks of toes better developed, first toe much 

 shorter than second; subarticular tubercles well developed; no plantar 

 tubercles; two well-developed metatarsal tubercles; no tarsal fold; 

 hind limbs being bent forward, heels reach the ears, bent vertically to 

 the axis of the body, the heels do not touch; skin above, throat, chest, 

 and anterior aspect of femurs smooth; belly and sides granular. 



Dimensions. 



mm. 



Tip of snout to vent 16. 5 



Width of head 6 



Diameter of eye 2. 5 



Diameter of tympanum 0. 8 



Fore leg from axilla. 7 



Hind leg from vent 22 



Vent to heel 12 



Color of living specimen. — Uniformly dusky chestnut above and 

 below, with scattered, scarcely visible pale dots; a short postocular 

 dusky band descending behind the tympanum. 



Habitat. — Only a single specimen was captured. It was caught on 

 the ground at our camp on El Yunque Mountain, about 2,978 feet 

 above the sea. 



Remarhs. — The present species is so different from the other Eleu- 

 therodactyli in Porto Rico, and in fact from all the species of this 

 multitudinous genus that a special comparison with any of them is 

 quite unnecessary. The declivous snout with the extreme posterior 

 position of the nostrils are quite unique, and I know of no West 

 Indian species which might be regarded as nearly allied. The uniform 

 coloration above and below is also remarkable. 



List of specimens of Eleutherodactylus unicolor. 



