214 APPENDIX F. REPTILES. 



flattened. A larger disc-like knob is observed on the middle and at the 

 base of the hand (fig. 3). 



The toes (fig. 4) are but slightly webbed, and, like the fingers, de- 

 pressed. The fourth is conspicuously the longest, and the third a little 

 longer than the fifth. The under surface of the feet (fig. 5) is covered 

 with smaller tubercles than those of the hands. A large spade-like 

 process exists at the base of the first or inner toe, exteriorly to which> 

 and at the base still of the metatarsus, is a small knob-like tubercle. The 

 body is thickly covered with papillae, with some large ones more con- 

 spicuous along the sides of the back ; on the flanks they are smaller, 

 similar to those of the intervening spaces on the back ; on the abdomen 

 the papillae are smaller still ; upper part of hands and feet minutely 

 granulated. The snout alone is smooth. 



The dark patches scattered over the upper part of the animal are 

 margined with a light yellowish line. Sinuating yellowish lines may be 

 observed on the sides of the belly, or flanks and legs. A rather large 

 spot is seen beneath the eye, and another in advance and beneath the 

 tympanum near the angle of the mouth. 



One specimen procured near the Water-hole between Camps 6 and 7. 



Plate XI, fig. 1, represents Bufo cognatus of natural size. 



Fig. 2. The head from above. 



Fig. 3. Left hand seen from below. 



Fig. 4. Right foot from above. 



Fig. 5. Right foot from below. 



2. Rana pipiens, Latr. — Bullfrog. 



Spec. char. Toes webbed to their extremity, fourth toe one-fourth 

 longer than the third and fifth. An elongated tubercle at the base of 

 tee first toe; sub articular tubercles of fingers and toes but slightly 

 developed. Vomerine teeth on two rounded and separated elevations 

 situated between the internal nostrils. Diameter of tympanum (in the 

 specimen before us) greater than the diameter of the eye. 



Syn. — Bana pipiens, Latr. Hist. Nat. Rept. II, 1802, 153. Harl. 



Amer. Jour. Sc. X, 62. Med. & Phys. Res., 1835, 101 ; and Jour. 



Acad. Nat. Sc. Philad. V, 1827, 335. Holbr. X. Amer. Herp. IV, 



1842, 77. PI. xviii. 

 Bana mugiens, Merr. Tent. Syst. Amph. 1820, 175. Dum. & B. 



Erp. gen. VIII, 1841, 370. 



The bullfrog is quite a common animal in the United States, though 

 its northern, western, and southern limits are not yet accurately known. 



