448 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



between the rami. Loral space rather excavated or concave. Nostrils 

 moderate, rather oblique; situated below the canthus rostralis, so as 

 to be fully visible beneath the outline of the profile; they are situated 

 half-way between the anterior canthus of the eye and the tip of the 

 suout, and not so far forward as the tip of the lower jaw; they are sep- 

 arated by about the diameter of the eye, or one-fourth the distance be- 

 tween the rami. Eyes large, projecting, their centers nearer the hinge 

 of the jaws than the end of snout, the posterior margins above the ric- 

 tus. Tympanum moderate, its posterior edge on a line with the poste- 

 rior end of jaws, its center raised, its longest diameter vertical, and 

 about two-thirds that of the eye. The light line under the eye is j^ro- 

 louged into a thickened glandular fold of skin which is interrupted 

 abruptly above the insertion of the arm ; the middle of the interval be. 

 tween this interruption and the end of the snout opposite the center 

 of the eye. The distance between the rami rather less than to the end 

 of snout. Upper jaw projecting moderately. 



The tongue is elongated, much longer than broad, free behind for 

 more than half its length and on the sides to the tip ; the two cornua 

 moderately prominent. Internal nares moderate, circular, and nearer 

 the anterior canthus of the eye than to the external nostrils. Teeth in 

 two small slightly elongated patches, placed with their axes a little in- 

 clining backwards and about intermediate between the nares, their an- 

 terior edges being in the same line. They are about as far apart behind 

 as their anterior edges are from the nares on either side. The teeth of 

 the upper jaw extend back to the gape of the mouth. 



The skin of the upper and exposed portions of body and limbs is 

 more or less roughened by minute and close-pressed tubercles, with 

 here and there a larger interspersed. These do not appear to be at all 

 glandular or excretive. They are largest and most prominent on the 

 sides and the posterior portion of the back, where they are generally 

 black. The posterior and inferior face of the thighs is granulated for 

 about two-thirds its length, as well as a small portion of the belly on 

 the pubic region. The sides are scarcely granulated, although coarsely 

 pustulate ; all the rest of the lower parts of body, including the con- 

 cealed surface, are perfectly smooth. The skin of the thigh is pierced 

 by innumerable fine pores. 



As already stated, there is a fold of skin as a continuation of the 

 light stripe along the edge of the upper jaw, and extending to a i>oint 

 just above the middle of the arm, thickened behind. A rounded de- 

 pressed ridge or fold of skin commences at the posterior end of the 

 eyelid, and, curving a little downwards to the tympanum, sends off a 

 short branch along its posterior border, then continues along the sides 

 of the body (over the extremities of the transverse processes of the 

 vertebra), ceasing at the insertion of the hind leg. 



The fore-legs are well developed ; the fore-arm shorter than the hand. 

 All the fingers are perfectly free. The third finger is longest, the first 



