214 BATRACHIA SALIENTIA. 
5. Leptodactylus perlevis. 
Cystignathus perlevis, Cope, Proc. Am. Phil. Soc. xviii. p. 269 (1879). 
Hab, Mexico, Western Tehuantepec, Tapana (Sumichrast}. 
Vomerine teeth in two short transverse series, well separated from each other, and 
extending but little beyond the inner border of the choane. Snout projecting a little 
beyond the mouth, with distinct canthus. Tympanum more than one-half of orbit. 
Toes not fringed. Skin particularly smooth and shining. Greyish, sides speckled 
with whitish; an interorbital dark spot; upper lip marbled. Posterior face of femur 
dark, with white specks. Hind limbs obscurely cross-banded above. (After Cope.) 
Length of body . ... .. .. . +. +. + . + 88 millim. 
» hindlimb. . . . . . ee ee ee Bg, 
” hind foot . . . 1... ee eee RB 
6. Leptodactylus caliginosus. 
Leptodactylus caliginosus, Girard, Proc. Ac. N. Se. Philad. 1853, p. 422; Bouleng. Batr. Sal. 
p. 247; and Zool. Record for 1887, Rept. p. 31. 
Cystignathus melanonotus, Hallowell, Proc. Ac. N. Sc. Philad. 1860, p. 480; Cope, Proc, Am. Phil. 
Soc. xviii. p. 269 (1879). 
Cystignathus echinatus, Brocchi, Bull. Soc. Philom. i. p. 181] (1877). 
Leptodactylus validus, Garman, Bull. Essex Inst. xix. p. 14 (1887). 
Leptodactylus echinatus, Brocchi, Miss. Sc. Mex., Batr. p. 18, t. 5. fig. 4. 
Leptodactylus melanonotus, Brocchi, ibid. p. 20; Cope, Bull. U. S. Nat. Mus. no. 32, p. 18 (1887). 
Hab. Mexico, Mazatlan, Misantla, Tehuantepec; Nicaragua; Costa Rica.—Sovutu 
America, Colombia, Ecuador, Demerara, Brazil, Paraguay ; ANTILLEs. 
Vomerine teeth in two slightly arched or straight series behind the choane. Snout 
rounded, moderately long. Tympanum two-thirds the size of the eye. Toes fringed ; 
two metatarsal tubercles. Skin smooth, with a few small flat tubercles, without 
longitudinal folds. Brownish, with indistinct darker markings; a large angular spot 
on the occiput. Hinder side of the thigh marbled with darker. Male with two 
spinous tubercles on the inner side of the first finger. 
An examination of specimens from various localities reveals an extraordinary amount 
of variation in the comparative length of the hind limbs, in the extent of the transverse 
series of vomerine teeth, and in the coloration of the abdomen—variations which 
generally in this and allied genera are used for specific distinction. ‘The extremes 
of these variations are, however, connected by intermediate forms; and therefore 
I agree with Boulenger, who, at any rate at present, leaves them under the same 
specific name. 
