ON THE ZOOLOGICAL POSITION OF TEXAS. 27 



everywhere smootli; ou the abdomen a faint discoiclal fold. Digits 

 short, moderately expanded and truncate at the extremity. Prominent 

 tubercles at the proximal ends of the phalanges below. First and sec- 

 ond anterior toes equal and shorter than fourth. The heel of the ap- 

 pressed hind limb reaches the middle of the tympanum, and the extrem- 

 ity of the tarsus a little anterior to the orbit. The fore limb is relatively 

 longer, the wrist extending beyond the extremity of the muzzle. The 

 tarsus is two-fifths the entire length of the posterior foot. The inter- 

 orbital space is flat and wide, and is but a trifle narrower than the ex- 

 panse of the sacral diapophyses. 



The color of the upper surfaces is a light i)urplish brown, closely 

 spotted with rather small closely placed and broadly defined, dark 

 brown spots. The spots are less distinct on the head. Inferior sur- 

 faces light yellowish, immaculate, this tint commencing as small spots 

 ou the pale ground of the sides. Limbs above brown, broadly cross- 

 banded with yellowish 5 femora behind, light brown with a few light 

 points. 



This frog was found by Mr. G. W. Marnock near Helotes, Bexar County, 

 Texas, and I dedicate it to him with much pleasure. 



Measurements. 



M. 



Total lengtli 032 



Length to line of posterior edge of tympanuna 012 



Width of head at same point 015 



Length of hind leg 043 



Length of hind foot 018 



Interorhital width 005 



ChoropMlus ocularis Daudin, Cope. This species resembles the east- 

 ern C. ocularis, but some specimens differ in the tuberculate character of 

 the skin of the superior surfaces, and in the rudimental web of the hind 

 foot. The head is rather short, and the anterior outline is a narrow 

 oval. The extremity of the muzzle projects beyond the mouth, and the 

 lores are slightly oblique and a little concave. The nostril is but little 

 nearer the extremity of the muzzle than the orbit. The vertical diam- 

 eter of the tympanum a little exceeds t!ie transverse, which is one-half 

 the long diameter of the eye-slit. The pupil, as in the other species of 

 this genus, is horizontal. The tongue is wide, discoid, and entire be- 

 hind. The ostia pliaryngea are smaller than the small choana\ The 

 vomerine patches are short and transverse; they are entirely within 

 the lines of the inner borders of the choanfe and behind the line of the 

 posterior borders of the same. 



