NATURAL SCIENCES OF PHILADELPHIA. 219 



BATRACHIA. 



Bufo gutturosus, Latr. (Giinther Cat, Anura B. M. PI. V. f3g. B.) 

 Hyla vasta, Cope, sp. nov. 

 Trachyceplialus marmoratus, D. B. 

 Lithodytes lineatus, Grav. 



HYLA VASTA, Cope, sp. nov. 



The largest species of the genus, equallmg in size the Hypsihoas 

 maximus, Gincloscopus granulatus, etc. 



Form stout and rather clumsj'. Head broad ; muzzle short, 

 rounded; canthus rostralis well marked, concave; vertex strongly 

 concave. Width of head at tympana .33 gi'eater than length to 

 line of the same. Eye not very large, tympanic disc one-fourth its 

 area. Teeth in two rather long transverse arches opposite the 

 posterior margin of the inner nares. Tongue broader than long ; 

 choause smaller than inner nares. Parietal fontanelle not larae. 



The limbs are stout, the forearm and tarsus bordered by a der- 

 mal fold behind, which has a scalloped thickened margin. No 

 fringes on the body, but the skin is covered everywhere with 

 small warts, which are indistinct or obsolete on the median upper 

 surfaces of body and limbs. The under surfaces, except the tibia, 

 are areolate-warty, nearly smooth on the pectoral region. The 

 fingers and toes are webbed to tlie base of the last phalange of all 

 but the longest or median toes. The dilations are immensely 

 large, the largest being twice the size of the tympanum. The fore 

 limb extended reaches a little beyond the groin ; the hind limb 

 measures the end of the muzzle with the heel. Some small dermal 

 flaps on the ischia. 



M. 



Length of head and body (5 inches) .... 0.126 



" to line of tympana 033 



" of fore limb 076 



of hind limb 187 



" of hind foot 081 



Color above smokj^ gray, blackish on the head, with a brown 

 band between the eyes. Inner surfaces dirty flesh-color, femur 

 with three or four dusky cross-bands, unspotted behind. Throat 

 black-spotted. 



Near the city of Santo Domingo, W. I. 



This tree-frog is probably not abundant, as it occurs now for 



1871.] 



