78 BATRACHIA. 



skin upon the head is rather thick, granular, and adhering to the skull, 

 whilst in B. boreas it is thin, loose, and smooth. The parotid glands 

 are smaller in the species which we now describe. 



DESCR. The entire length of the specimen figured, the only one 

 apparently full-grown amongst those collected, is a little more than 

 three inches and a half, the head constituting nearly the fourth of 

 that length. Viewed from above, the head is subtriangular, broader 

 than long, the snout being almost abruptly truncated, another feature 

 which will distinguish this species from B. boreas. Its upper surface 

 is slightly depressed, without any ridges or groove, but densely covered 

 with small tubercles. The interocular space, measured across the 

 middle of the eyes, is greater than the greatest width of the upper lid, 

 whilst it is equal to it in B. boreas. The canthus rostralis is slightly 

 swollen ; the nostrils, situated immediately beneath its anterior extre- 

 mity, are much nearer to the orbit than to the notch of the upper jaw. 

 The upper eyelid is tuberculous. The tympanum is quite small and 

 subcircular. The parotids, rather small, elongated, narrowest ante- 

 riorly, are situated horizontally over the shoulders ; they approximate 

 anteriorly the eye and externally the tympanum ; they are perforated 

 with comparatively few, but large pores. The upper jaw is emargi- 

 nated ; the tongue large and elongated ; the inner nostrils transversely 

 oblong and small, and the openings of the Eustachian tubes much 

 smaller still. 



The limbs are very long and of slender appearance. The fingers 

 are stout, subdepressed ; the tubercle under their first articulation is the 

 only one well developed. The palm of the hand and under surface of 

 the fingers are rugose and tuberculous. The central metacarpal disk 

 is large, rounded, and depressed ; the inner one being much the smallest, 

 scarcely larger than the subarticulary tubercle of the inner finger. The 

 first, second, and fourth fingers are almost equal in length ; the third 

 is, as usual, the longest. The hind limbs are somewhat longer than 

 the body and head together ; they are, as already alluded to, shorter 

 than in B. boreas. The toes are depressed, and the membrane, 

 although extending to their tips, is nevertheless more deeply emargi- 

 nated than in B. boreas. Tubercles may be seen under each articu- 

 lation of the phalanges, although none are conspicuous. The soles of 

 the feet is densely covered with small granules. The metatarsus, 

 beneath, is also provided with small granules, and its inner and lower 



