21 



BUFO COGNATUS.— Say. 



Piatt V. 



Characters. Head large, canaliculated posteriorly, smooth anteriorly; body 

 above dusky, verrucose, and marked with vertebral and oblique lateral lines of 

 yellowish-brown; abdomen dirty white and granulated; feet armed with a spade- 

 like process near the root of the first toe. 



Synontmes. Bufo cognatus, Say, in Long's Exped. to Rock. Mount, vol. ii. p. 190. 

 Bufo cognatus, Harlan, Med. and Phys. Res., p. 109. 



Description. The head is large, rounded at the snout, and canaliculated or 

 marked with a deep groove above. This groove begins at the posterior part of 

 the head, m here it is deep, but it hardly reaches the anterior canthus of the eye, 

 when it disappears, and the remaining portion of the head is smooth. 



The nostrils are rather near the snout. The eyes are large and prominent, 

 with the pupil dusky and the iris grey, reticulated with bright yellow. 



The mouth is very large, with the jaws entire. The tympanum is distinct, but 

 of moderate size. The parotid glands are large, and of oblong form. 



The body is thick, rounded, dusky-brown above, and is covered with small 

 black warts, which are most numerous and prominent near the sides. A yellow- 

 ish-brown vertebral line extends from the head to the rump, from which proceed 

 oblique lateral lines of the same colour. The first oblique lateral line begins at 

 Vol. V. 



