320 PROCEEDINGS OF THE ACADEMY OF [1899. 



The tongue is broadly reniform, presenting a median longitu- 

 dinal depression and some irregular wrinkles. Its margin is 

 smooth, but the greater part of the upper surface is thickly cov- 

 ered with slender papillse, forming a plush-like surface. The 

 lateral and posterior margins are free, the anterior attached in the 

 middle. The pedicle of attachment is triangular in section, its 

 broad part corresponding with the anterior margin, and its apex 

 with the posterior emargination. 



The female type specimen is larger and more robust, with a 

 shorter tail and broader, more flattened head. The snout is espe- 

 cially broad and flat, its width on a line with the anterior angles of 

 the eyes being twice its length anterior to that line. The canthal 

 tubercle is almost obsolete. The gular fold is distinctly curved 

 forward. The appressed limbs are separated by slightly more than 

 two costal interspaces. There is but one groove anterior to the 

 axillary. The dorsal series of sense pores is better developed than 

 in the male. The colors are duller and less pure in this example. 

 The ground color above is buff, large blotches of which alternate 

 with still larger blotches of a purpUsh black on the dorsal surface. 

 These blotches are largest at the base of the tail and pelvic 

 region, but on the head break up and become intermixed. 

 Below, the color is very generally a dull yellowish ash. 



A second female example, used for dissection and for the 

 preparation of a skeleton, was similar to the last, but had two 

 preaxiUary grooves, as in the male specimen first described. This 

 species exhibits in its skull many peculiarities Avhich readily distin- 

 guish it from any of the described species of Desmognathus, in 

 which the cranial charactei-s are remarkably uniform. Thorius is 

 clearly separated by the very large size of the nostrils Avhich 

 encroach largely upon the consequently very narrow premaxillary, 

 by the high, narrow and strongly convex snout and by the ossified 

 carpus and tarsus. The skeleton of Typhlotriton has not been 

 described, but in the arched palate and position of the choanse, 

 etc., this genus approaches Desmognathus, from which it is chiefly 

 distinguished by the strongly developed curved series of palatine 

 teeth and the deep-sunken functionless eyes. 



In L. marmorata the orbits are large and cause much of the great 

 relative width of the skuU, while the interorbital portion of the 

 brain case is comparatively narrow. At their widest part the 



