22 BUFO COGNATUS. 



the head and runs to the side, behind the shoulder; the second begins near the 

 middle of the back by two branches which soon unite and run to the groin; a 

 third line begins still further back and extends to the hips. 



The abdomen is dingy yellowish-white, and is thickly granulated. 



The anterior extremities are dusky-brown above, and dingy-white below, with 

 four fingers, free in their whole extent. The posterior extremities are well 

 developed, coloured like the back above, with bars of yellowish-brown, and are 

 dingy-white below. There are five toes, semi-palmated, with a spade-like process 

 at the metatarsus, near the root of the first toe. 



Dimensions. Length, 3| inches. 



Habits. The Bufo cognatus "resides in prairies destitute of timber, where 

 they are much exposed to the direct rays of the sun." 



Geographical Distribution. This toad has as yet only been found towards 

 the foot of the Rocky Mountains. 



General Remarks. Mr. Say was the first naturalist that observed this reptile, 

 which he described under the specific name cognatus. I have never seen the 

 living animal, and cannot, therefore, answer for the correctness of the colours of 

 the accompanying plate. The specimen that I saw seemed closely allied to the 

 Bufo Americanus, yet it is a larger animal, with the head shorter and broader, 

 and the body differently marked; and Say observes that its habits are different, as 

 it does not dislike the sun's rays. 



