2G * UNITED STATES AND MEXICAN BOUNDARY. 



Quite abundant along the shores of the Gulf of Mexico, north and south of the Bio Grande 

 del Norte, (Rio Bravo.) 



108. BUFO SPECIOSUS, Grd. 



Plate XL, Figs. 5 — 10. 



Bufo specioms, Girard 



Spec. Char. — Head moderate; its upper surface smooth and even, else showing slight traces of ridges 

 or crests. Snout sub-truncated and rounded; nostrils sub-terminal. Mouth large; upper jaw slightly 

 emarginated. Tongue small, elongated, free posteriorly upon the fourth of its length. A sub-gular 

 vocal bladder in the male sex. Tympanum of medium size. Parotids sub-rhomboid, of stoutish appear- 

 ance. Limbs of moderate development. First finger much longer than the second, which is equal to 

 the fourth. A large sub-circular carpal disk. Toes semipalmated. Two metatarsal, spade-shaped pro- 

 cesses; the innermost being much the largest. A membranous fold at the inner lower edge of the tarsus. 

 Skin above covered with papillae of moderate development, and with small warts beneath. Color above 

 greenish brown, maculated; no dorsal lighter vitta or streak. Beneath greenish or yellowish white, 

 unicolor. — (Girard.) 



Lower Rio Grande. 



109. BUFO ALVARIUS, Grd. 

 Plate XLI, Figs. 1 — 6. 



Spec. Char. — Upper surface of head nearly plane upon its middle region; orbits bordered by a low 

 and rounded off ridge; its skin being thin and adhering to the skull. Parotids well developed and sub- 

 reniform. Eyes and tympanum rather large also. Tongue elongated, broadest posteriorly. Upper jaw 

 emarginated. Two large carpal callosities. A membranous fold at the inner lower edsre of the tarsus. 



& 



Toes palmated; two metatarsal tubercles. Palms and soles coarsely granular. Upper surface of body 

 exhibiting numerous glandular tubercles; large pustular swelling upon the thighs.' Color uniformly 

 dark green. — (Girard.) 



Yallev of Gila and Colorado. A. Schott. 



110. BUFO HALOPHILA, B. & G. 



Plate XLI, Figs. T— 12. 



ifo halophila 



Spec. Char.— Upper surface of head without either crests or grooves. Skin thick and adhering to the 

 skull. Snout rounded. Parotids of medium size. Eyes moderate. Tympanum small. Tongue lanceolated; 

 broadest posteriorly. Upper jaw emarginated. Inner finger longer than the second. Two carpal disks- 

 A membranous fold along the inner edge of the tarsus. Toes semipalmated; two metatarsal tubercles. 

 A narrow yellowish dorsal streak or vitta. Ground color greenish yellow, with numerous black spots 

 and dots distributed all over the upper surface and sides of the body, head, and limbs. Beneath unicolor, 

 of a dingy yellow. — (Giraro.) 



Coast of California. 



111. BUFO IXSIDIOR, Grd 

 Plate XLI, Figs. 13—18. 



ifo iimdior 



Char 



-Lpp-r surface of head plane and smooth. Snout sub-acute, protruding. Mouth moderate; 

 upper jaw slightly emarginated. Tongue elongated, tapering towards both extremities. Tympanum 

 inconspicuous. Parotids large and elongated, obliquely situated across the shoulders. Limbs moderate 







