578 KEPOET OF NATIONAL MUSEUM, 1902. 



Beak white with black edges, the cutting- edges plainly denticulated 

 like the dental rows; lips with a double row of papillae except on the 

 median half of the upper lip, the sides forming- an inward fold; the 

 series of labial teeth f , all equally long- and occupying- the whole width 

 of the lips; the first upper series narrowly interrupted in the middle, 

 the others uninterrupted. 



Lines of muciferons ducts rather indistinct in this specimen. They 

 are better developed in the specimens of No. 27234, taken by me at 

 Utuado on April !), 1900, especially in 27234<7, which shows also the 

 lateral lines. Two lines start on the head; one between the nostrils, 

 the other near the corner of the mouth, converging backward above 

 and below the e}^e and meeting a short distance behind the latter; 

 from this point they diverge again toward the tail; from the eye a 

 short line of crypts descends a short distance in a vertical direction; 

 a lateral line begins above the anterior end of the spiraculum and 

 curving above the latter is lost above the insertion of the hind limbs. 



Color (in alcohol) dusky olive gray on back, underside and tail 

 whitish, the latter more or less irregularly marbled and mottled with 

 dusky. 



Dimensions of largest tadpole (No. 26895): mm. 



Length of body 15 



Length of tail 31 



Width of body 11 



Distance between nostrils 2 



Nostril from eye 2 



Distance between eyes 2. 5 



Diameter of eye 2 



Width of mouth 3. 5 



Greatest depth of tail 7 



Depth of muscular part of tail at its base 4.5 



The total length of the largest adult animal being 144 mm. , it is 

 consequently a little more than three times as large as the largest 

 tadpole. 



Hal>) tat. — The frog — as we may well call the Leptodactylus albilabris 

 on account of its exceedingly frog-like aspect — is found all over Porto 

 Rico and Vieques near streams and in marshy places, except in the 

 highest altitudes. It has been found as high up as Adjuntas (about 

 1,400 feet altitude) by Mr. Baker, but it is doubtful whether it ascends 

 above the coffee belt. On the northern and eastern side of El Yunque 

 Mountain Dr. Richmond and I did not see it much above the Catalina 

 plantation, or about 900 feet altitude. 



Habits. — The breeding season of this frog seems to be early in the 

 year, as we found a young one with the tail still unabsorbed on Feb : 

 ruary 20. Full-grown tadpoles were also observed at the Catalina 

 plantation on March 1. In a little stream behind the town of Utuado, 

 on April 7, 1 not only obtained tadpoles in all stages, but also observed 



