THE BATRACHIA OF NORTH AMERICA. 117 



an oval, with produced aud rounded muzzle, wliicli projects beyond the 

 lower jaw. The animal resembles a Plethodon rather than the species 

 of Amblystoma, but its vomerine teeth and tongue have all the char- 

 acters of the CJiondrotus microstomus. 



The vomerine teeth form a convex series, extending forwards to a 

 point between the choante, where they are slightly interrupted on the 

 middle line. The tongue is large, filling the floor of the mouth, and is 

 extensively free at the sides only. The external nostrils are nearly 

 terminal and are rather near together, the space between them being 

 equal to just half that between the bases of the eyelids and about three- 

 fifths that between the choante. The width between the eyes behind 

 is equal to the axial length from the same to the end of the muzzle. 

 The width of the head enters the length to the groin seven times. The 

 length from the muzzle to the axilla enters the distance from the latter 

 to the groin 1| timen. 



The lateral digits are distinct and the median ones moderately elon- 

 gate. Their lengths, beginning with the shortest, are : Fore-foot, 2, 5, 

 3, 4; hind foot, 1, 5, 2, 3, 4. The phalanges are: Fore-foot, 2, 2, 3, 2 ; 

 hind foot, 2, 2, 3, 4, 2. No palmai or plantar tubercles. 



The skin is perfectly smooth, aud between the axilla and the groin it 

 is marked by fourteen grooves. There are no dermal margins to the 

 fingers or the tail. The cloacal orifice is a simple slit. There is a dis- 

 tinct postgular fold. 



D ^ /n 



'A\ 1 I )a\ 2 



* 4 Q 5 6 7 



Fig. 26. Lingucelapsus lepturus. Kat. size, except fig. 5. 



Measurements. 



M. 



Total leugtli. 11") 



Length from end of muzzle to base of tail 092 



Length from end of muzzle to groin ., 0515 



Length from end of muzzle to axilla 020 



Length from end of muzzle to cauthus oris 0065 



Length of fore-leg 013 



Length of fore-foot 0055 



Length of hind leg 016 



Length of hind foot 0075 



Width of head 0075 



Depth of tail at middle , 0025 



The color of the typical specimen in alcohol is purplish-brown above 

 and paler below. There are numerous not well-defined whitish spots 

 on the sides and a few on the belly, and there are some very faint and 

 delicate gray lines across the posterior part of the back. The tail is 

 densely speckled with gray on the sides, and delicate gray lines across 



