1887.] ^-'- [Cope. 



M. 



Length of head and body 0155 



" " '' to line (posterior) of tympana 0055 



Width " " at " " " " 005 



Lengtli of anterior leg 009 



foot 004 



" " posterior leg 0258 



foot 013 



" " " " less tarsus 008 



This species belongs to the group of P. marmorata of Boulenger's 

 system. Two specimens. 



Dedicated to my friend Dr. Florentine Ameghino, the distinguished 

 naturalist of Buenos Ayres. 



13. LEPTODACTYLtrS GRACILIS D. & B. 



One rather large individual. 



14. Leptodactylus bkevipes, sp. nov. ^ 



Form rather stout, legs short. The heel of the extended hind leg 

 reaches to the middle of the orbit, and the foot is as long as the rest of the 

 leg measured to the groin. 



The outline of the head from above is an acuminate oval. The muzzle 

 projects a. little beyond the lip when viewed in profile. The top of the 

 head is flat, but the canthus rostralis is so obtuse as to be scarcely notice- 

 able. The nostril is almost terminal, and as far from the orbit as the 

 diameter of the latter. The tympanic membrane is round, and is equal to 

 two-thirds the orbit in diameter. The vomerine teeth are in two short, 

 nearly transverse patches, well behind the internareal palatal space. The 

 tongue is a wide oval, slightly emargiuate behind. 



The second, fourth and fifth fingers are equal in length. The toes 

 contract to their extremities, and have a membranous border on each side 

 and a rudimental web at the base. The external border of the external 

 toe is continued along the external edge of the sole of the calcaneum, 

 terminating near a small, round tubercle. The internal tarsal tubercle is 

 an oval, attached by one side. There is an obtuse dermal ridge extending 

 along the inner edge of the tarsus. 



There is a strong dermal fold above the tympanic membrane, which is 

 deflected towards the humerus. Another ridge extends from the eyelid to 

 above the axilla. Another ridge commences a short distance from the 

 end of the last mentioned, and ceases just above the groin. Skin of 

 superior surfaces with numerous small warts, below, except adjacent 

 parts of femora, smooth, A discoidal fold of abdominal integument. All 

 the ridges and warts of the upper surface might readily disappear on 

 prolonged preservation in weak alcohol. 



The color of the upper surfaces is a blackish brown, which does not 

 extend on the sides, but forms a dark band from the eye through the 

 tympanum to near the shoulder. There is a paler band across the front 



