THE BATRACHIA OF NORTH AMERICA. 299 



Head large; maxillarj' outline rounded. Profile of front a rather steep 

 descent from the swollen occiput, where the skin is thin, closely adhe- 

 rent, and penetrated by osseous granules. Eyes prominent. Tympa- 

 num distinct, half its extent larger than ostia pharyngea. Vomerine 

 teeth in two fasiculi between and behind the posterior borders of tlie 

 latter. Parotoids small, rounded, prominent. No gland on the tibia ; 

 one on each side of the thorax near the axilla. Skin of back minutel}^ 

 tuberculous, of sides more coarsely; below nearly smooth. Cuneiform 

 process longer than in any other species of the genus, but not more 

 prominent. Heel of extended hind leg reaching posterior edge of tym- 

 panum. 



The inner nostrils are large, open, rather elongated transversely, and 

 wider apart than are the external nares. The vomerine teeth are in 

 two patches, situated within the inner nares, and on a line with their 

 posterior borders. The teeth in the margin of the jaw are continuous, 

 though not much developed. The tongue is longitudinally oval, not 

 emarginate behind in the specimen examined, where it is free for nearly 

 half its length. 



The skin above and on the sides is covered pretty uniformly with 

 tubercles or pustules, with smaller hard black ones interspersed. The 

 first mentioned are wanting on the head and outer surfaces of the limbs, 

 where the others, however, may be observed. A few pustules about 

 the anus on the buttocks which show little signs of granulation. There 

 is a short parotid gland just above and behind the tympanum. 



The arm is well developed ; the hand much shorter than the fore-arm. 

 The outer finger is very short; then the second; the fourth is a little 

 shorter than the third, or longest. All are subtruncate, or thickened 

 at the tips. A thickened web may be traced between the bases of the 

 fingers, although such palmation is not very evident. On the inner 

 and upper faces of the two inner fingers is a black, callous thickening 

 of the epidermis. The tibia is much shorter than the femur, and not 

 one-third the total length of body; the foot and femur about equal. 

 The metatarsal bones are firmly united nearly to the end by iiiter- 

 mediate muscle, and a web extends between the tips of the short toes. 

 The outer toe is very short, but little exceeding the third, and the web 

 between it and the fourth toe is proportionally reduced. 



All the toes are much deiDressed, and invested by the thickened skin. 

 At the base of the inner toe is an elongated, comi^ressed, and well-de- 

 veloped spade like process, with a sharp horny edge, of a black color; 

 a trace of the same is seen on the inner edge of the tip of the inner 

 too. The sole is perfectly smooth, and there is no tubercle of any kind 

 except the spade-like process. 



Color above, in spirits, either earth-brown, fulvous-brown, or ashy- 

 brown, with a pale ashy band from each orbit ; these converge again 

 on the coccyx. Those bands are rarely unbroken, and are sometimes 

 exceedingly indistinct; they sometimes inclose a pale area. Sides 



