146 



VERTEBRATE AXIMALS OF THE UNITED STATES 



2. Leurognathus ^loore. Body of large size; internal nares very 

 inconspicuous and twice as far apart as the nostrils; vertebrae opis- 

 thocoelous; vomerine teeth absent: i species. 



L. marmorata Moore. Body 128 mm. long; tail 53 mm.; para- 

 sphenoid teeth in 2 patches which touch anteriorly; costal grooves 

 13; tail keeled; color brownish above; belly black in old specimens: 

 North Carolina mountains; rare; aquatic. 



Fig. 73. — Desmognathus phoca {from Dunn). 



3. Plethodon Tschudi. Body slender and elongate; tongue 

 attached except at its lateral margins; vertebrae amphicoelous ; premaxil- 

 laries separate; parasphenoid and vomerine teeth present, the 2 para- 

 sphenoid patches in contact throughout; toes 4-5: about 15 species, all 

 American. Both adults and larvae are largely terrestrial, living in 

 damp places, under stones and logs, the larvae in some species losing 

 their gills while still in the egg, and never entering the water. The 

 eggs are sometimes carried in the mouth of the female. 



Key to the Species of Plethodon 



ai Species occurring east of the Pacific slope. 



bi Color not uniformly plumbeous, and with spots or stripes. 

 Ci With a broad middorsal red stripe. 



di Costal grooves 19; stripe straight P. cinereiis. 



d2 Costal grooves 17; stripe zigzag P. dorsalis. 



C2 No such stripe present; costal grooves 14. 



di Back blackish, dotted with white P. gliitinosus. 



di Back red or chestnut P. yonahlossee. 



bo Color uniformly plumbeous. 

 Ci Body without color markings. 



di Belly mottled; costal grooves ig P. cinereus. 



6.2 Belly plain. 



ei Costal grooves 14 P. metcalfi. 



tz Costal grooves 17 P. wehrlei. 



C2 Body with color markings. 



di Legs red P. sliermani. 



di With a yellow stripe from eye to gular fold P.jordani. 



