4, BUFO. 309 
second; toes half webbed; two metatarsal tubercles; no tarsal 
fold. The hind limb being carried forwards along the body, the 
tarso-metatarsal articulation reaches the tympanum or the eye. 
Upper surfaces with irregular warts; parotoids moderate, elliptic 
_ or kidney-shaped. Brownish olive above, with dark-brown spots, 
two of which form a chevron between the eyes; generally a light 
vertebral line; lower surfaces immaculate or dark-spotted. Male 
with a subgular vocal sac. 
Var. A. americanus. 
Bufo americanus, (Leconte) Holbr. N.-Amer. Herp. v. pl. 4; Dum. 
&§ Libr. p. 695; Hallow. Proc. Ac. Philad. 1856, p. 251; Girard, 
U.S. Mex. Bound. Surv. ii. p. 253; Wied, Nova Acta, xxxii. p. 121. 
quercicus, Holbr. N.-Amer. Herp. vy. pl. 3. 
dorsalis, Hallow. Proc. Ac. Philad. 1852, p. 181, and in Sit- 
greaves, Exped, Zuni § Color. Riv. p. 142, pl. 19. 
—— woodhousii, Girard, Proc. Ac. Philad. 1854, p. 86. 
Chilophryne americana, Cope, Proc. Ac. Philad, 1863, p. 357. 
Upper view of head. Lower surface of foot. 
Supraorbital ridges low ; subarticular tubercles under the toes 
generally double; immer metatarsal tubercle large, compressed, 
spade-shaped ; outer tubercle small. 
pea ie Great Bear Lake. Sir J. Richardson [ P. }. 
b-d. Yg. Lake Winnipeg. Sir J. Richardson | P. ]. 
65/9". New York. 
ft, yg. 2 & albinos, yg. N. America. Dr. J. Green [P.]. 
h-i,k. 2 & yg. N. America. Lord Ampthill [P.]. 
Lm n. 3 Q. N. America. 
De America. 
po. Mexico. 
(This specimen is intermediate between vars. A and B.) 
g. Many spec., yg. Brazil (??). Dr. Gardiner [ P.]. 
Fie. Puerto Cabello (?). 
Var. B. musicus. 
Bufo musicus, Latr. Rept. ii. p. 127; Daud. Rain. p. 9, pl. 33. f. 3, 
and Rept. viii, p. 190; Merr. Tent. p. 185; Gravenh, Delic.-p, 59 ; 
