560 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



Description of type. — AduH: Vomero-palatine teeth (lig. 1) in two 

 short, oblique, curved series, which do not extend outward beyond the 

 choana?, each series consisting of five to six rather hirge teeth; the 

 distance between the series posteriori}" equals about three-fourths of 

 the length of the series; distance of vomero-palatine series from para- 

 sphenoid patches greater than length of series; parasphenoid teeth in 

 two narrowly though distinctly separate patches, the teeth rather 

 large, arranged in parallel, oblique rows, about five in each row; 

 tongue ver\' large, filling the entire floor of the mouth, thin, posterior 

 half free, anterior portion narrowh" attached along the median line; 

 snout slightly projecting beyond lower jaw, rounded, truncate, or even 

 slightly concave between the nostrils; distance between the latter 

 equals the interorbital space and their distance from the e^'es; a dis- 

 tinct groove from posterior margin of nostril to the edge of the lip, 

 slightly oblique toward the front; a deep groove from posterior angle 

 of eye along side of neck to the gular fold, another groove descending 



Fig. 1. Fig. 2. Fig. ;i 



Fig. 1.— Dentition of Plethodon shermani. U. S. N.M. No. 36214. 3 x n.\t. .size. 

 Fig. 2. —Dentition of Plethodon .*:neus. U.S. N.M. No. 16(;60. 3 x nat. size. 

 Fig. 3. — Dentition of Plethodon jordani. U.S. N. M. No. SS^OT. 3x nat. size. 



verticalh' from it behind the angle of mouth to the posterior end of 

 the mandible; gular fold very deep, ascending on the sides of the neck; 

 distance from tip of snout to gular fold contained about four times in dis- 

 tance to vent and a))out twice and a third times in distance between axilla 

 and groin; limbs well developed, tips of fingers and toes nearly meet- 

 ing when pressed along the sides of the body; digits not dilated at tips; 

 fingers (fig. 4) well developed except inner, which is almost rudimentar}', 

 third much longer than second, which is longer than fourth; inner toe 

 (tig. .")) very small, fourth longest, slightly longer than third, second and 

 fifth subequal; tail slender, tapering to a point, sulxylindric anteriorly, 

 .slightly comprc^ssed posteriorly, longer than head and body by the width 

 of the head; fourteen strongly marked costal grooves, with one above 

 and behind the insertion of the fore leg, and one above and in front of 

 the hind leg, none of which descend to the lower surface. Color in 

 life said to be "uniformly plumbeous with brick-red legs;" in alcohol, 

 the color abo\e and on the sides is bluish plumbeous, the whole surface 

 luider the mai>nifving glass showiiioa uniform dusting over of minute 



