254 BATRACHIA SALIENTIA. 
passing into a lateral series of conical tubercles; the crest is highest above the 
tympanum, much less developed in the young than in mature specimens. Snout 
pointed, compressed, with sharp canthus. Tympanum distinct, round, two-thirds the 
size of the eye. Parotoid smaller. Upper parts with small, flat tubercles, lower 
roughly granular. First and second fingers equal. Toes not quite half-webbed; two 
smal] metatarsal tubercles; no tarsal fold. Light brownish, with some irregular ashy 
or whitish spots ; lower parts whitish. 
Ad. 9. 
Distance of vent from snout . . . . . . . .) .) 84 millim. 
» » metatarsal joint . . . . . . 78 ,, 
» 7 end of fourth toe. . . . . . 108 
33 
19. Bufo simus. 
Bufo simus, Schmidt, Denkschr. Ak. Wiss. Wien, 1858, p. 254. 
Bufo intermedius, Cope, Proc. Am. Phil. Soc. xxii. p. 379 (1885); Bull. U. S. Nat. Mus. no. 32, 
p. 10 (1887) (nec Giinth.) ; Dugés, La Nat. Mex. (2) ii. p. 482 (1896). 
Hab. Mexico, Presidio, Milpas in Durango ( Forrer), Guanajuato, Huazteca Potosina, 
and Silao (Dugés), Sierra de Bolafios and Jalisco (Buller), Omilteme and 
Amula (H. H. Smith), Vera Cruz ( Cope), Orizaba (Sumichrast) ; Panama, Chiriqui 
(Schmidt). 
The projecting ridges of the head are rather feebly developed, even in the adult; 
the supraorbital converge in front, and terminate behind in a fork, the prongs of 
which are short; young examples without ridges. The interorbital space is concave 
(in the adult) and broader than the supraocular cover. Snout rather short, with 
the sides slightly sloping. Tympanum quite hidden under tubercular skin. Parotoids 
of moderate size, prominent, elliptical, immediately behind the hind margin of the 
orbit. Upper parts rather densely covered with small, sometimes spiny, tubercles ; 
lower parts coarsely granular. First finger longer than second; toes two-thirds 
webbed; two metatarsal tubercles, of which the inner is somewhat compressed ; a 
series of pointed tubercles takes the place of a tarsal fold. Greyish or brownish 
above, marbled with darker and sometimes with pink blotches ; lower parts uniform 
whitish, sometimes, and in the young always, spotted with black. 
2. 2. 
Distance of vent from snout . . . . . . 87 millim. 75 millim. 
» > metatarsal jot. . . 71 ,, 70 =u, 
» » end of fourth toe . . 102 ,, 98, 
This species was originally described from young examples, the largest of which 
was only 26 millim. long. At that age, and even in specimens up to 50 millim. in 
length, the cephalic crests are not developed, the crown being as flat as in the flat- 
headed toads generally. Yet I should have hesitated to refer our Mexican specimens 
