BATRACHIAANOURA. 77 



Specimens of this species were collected up Puget Sound, Oregon, in 

 May, 1841. A sketch from life was made at the same epoch. 



Plate VI, fig. 4, represents Bufo horeas, size of life. 



Fig. 5, is a side view of the head. 



Fig. 6, an upper view of the head. 



Fig. 7, the head, seen from beneath. 



Fig. 8, the under surface of the right hand. 



Fig. 9, the under surface of the left foot. 



2. Bufo columbiensis, B. & G. 



(Plate y, figs. 4-9.) 



Car. spec. — Caiiitis facie superiore plana. Cute calvae adhaerente et 

 granulata. Glandulis parotidis parvis. Tympana parvo. Plicatura 

 memhranea in tarso. Plantarum digitis ixdmatis. Supra virides- 

 cente, cum macidis nigris et punctis ridjescentibus. Yitta alba dorsuali. 

 Suh oculo macula ohliqua. Infra flavo sordidoj maculato. 



Spec. Char. — Upper surface of head plane. Skin adhering to the 

 skull and granulated. Parotids small. Tympanum small also. A 

 membranous tarsal fold. Toes palmated. Light-greenish, with 

 black blotches and reddish spots. A dorsal, white vitta. An 

 oblique, dark patch beneath the eye. Interiorly, of a soiled yellow, 

 maculated. 



Syn.— Bufo columbiensis, B. & Gc. in Proc. Acad. Nat. Sci. Philad. YI, 1853, 378.— 

 Grd. in Proc. Acad. Nat. Sci. Philad. VII, 1854, 87. 



Observ. — The characters by which this species can be distinguished 

 from B. horeas, consist in the comparative length of the forearm, arm, 

 and hand, which are almost equal in length in B. columbiensis, whilst 

 in B. boreas, the forearm is longer than either the arm and the hand ; 

 both pairs of limbs are longer too, and, in the posterior pair, the foot 

 is the region which is the most developed. The membrane which unites 

 the toes is more deeply emarginated in B. columbiensis than in B. boreas; 

 the inferior surfoce of the hands and feet is conspicuously granulated 

 in the former, and nearly smooth in the latter. In B. cdumbiemis the 



20 



