354 PROCEEDINGS OF THE ACADEMY OF 



brown ; mandibular border wbitisb, maxillary border brown ; one specimen 

 with a brown vertebral line. 



This species resembles the H. fasciatus of Giinther in some respects, but 

 is more allied to H. b o a n s. In the latter three phalanges of the fourth digit 

 are free ; the canthus rostralis is acute, and there are various differences in 

 coloration. The raniceps was obtained on the Rio Vermejo. Nos. 5408- 

 5036. 



Hyla acuminata Cope 



Head longer than wide, muzzle rather pointed, depressed, the canthus 

 rostralis almost obsolete. Nostrils not pierced in a swelling. Eyes promi- 

 nent, not large, twice as large as tympanic disc. Skin of upper surfaces 

 warty or nearly smooth ; gular region areolated. Heel reaching anterior 

 border of orbit ; two phalanges of fourth toe free. Fingers entirely free, 

 vomerine teeth in two straight transverse series, opposite the posterior margin 

 of internal nares. Tongue short elliptic, slightly emarginate. Muzzle to pos- 

 terior border of tympanum 7 lines, do. to anus 1 in. 9 lin., anterior extremity 

 10 lin., posterior do. 2 in. 5 lin. No. 5843. A subgular vocal vesicle. 



General color brownish gray, beneath uniform, or with a few blackish ver- 

 miculations ; above with a blackish triangular spot between the eyes, and 

 shades and streaks on the sacral and scapular regions. Hinder extremity 

 crossbanded with blackish, most distinctly on femur ; the anterior and pos- 

 terior surfaces of the latter marbled with blackish. 



This species resembles Cystignathus podicipinus in form, and Hyla 

 versicolor in coloration. 



Hyla n a s i c a Cope 



Head small, as long as broad, narrow anteriorly, muzzle depressed, promi- 

 nent, faint. Eye rather small, twice the extent of the tympanum. Tongue 

 elliptic, scarcely emarginate, vomerine teeth in two transverse contiguous 

 short rows between the internal nares. Fingers free or nearly so. Skin 

 above slightly tuberculous. Gular region faintly areolated, a vocal sac. 

 Length of head and body 1 in. 5 1. Breadth of gular region 4-5 lines. From 

 anus to end of fourth toe 1 in. 9. lin. 



Beneath pale, uniform. Above dark rufous brown with some darker longi- 

 tudinal markings on the back. A dark band from muzzle through tympanum 

 to side. Femur and posterior lateral region varied with dark brown. No. 

 5835. 



This animal resembles the vauterii, but the head is smaller, nar- 

 rower and more acuminate ; the tongue is more elongate and the vomerine 

 teeth are more anterior. 



Hyla vauterii Bibr. Giinther, Catal. Brit. Mus., 106. No. 5407. (Braz.) 



Scytopis h e b e s Cope. 



Char. gen. Maxillary and vomerine teeth. Tongue slightly free posteriorly. 

 Ear perfectly developed, tympanum not concealed. Diapophysis of sacrum 

 dilated. Toes webbed. Large paratoids, which are confluent, covering the 

 anterior part of the back and top of head to muzzle. 



This genus, it will be seen, enters the "family " Pelodryadidae of Dr. Giin- 

 ther, which has been heretofore represented by but one genus, established for 

 an Australian species. 



Char. spec. Ostia pharyngea and internal nares large, the vomerine teeth 

 in two straight transverse series behind the posterior border of the latter. 

 Tongue broader than long, scarcely emarginate. Tympanum horizontally 

 elliptic, overhung by the paratoid ; half as large as eye. Eyelid not promi- 

 nent, encroached upon by the paratoid. Skin above with a few depressed 

 protuberances ; head and body beneath everywhere coarsely areolated ; the 

 skin thick and coriaceous. Head broader than long, loral region concave, 



[Sept. 



