152 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



Measurements, in inches. 

 In. Lin. 



Length: 



Measured along axis of body. 5 11 

 From snout to gape_ (on 



front) 5 



From snout to gular fold 8 



From snout to aruipi t 1 



Froiti snout to groin 2 5 



From snout to center of anal 



slit 



Head : 



Width of bead 



Width of tongue 



Length of orbit 



Distance between eyes an- 

 teriorly 3. 3 



Distance between outer nos- 

 trils 2.3 



4.5 



(;.75 



3. 7.^1 

 2.2 



In. Lin. 



Head — Continued. 



Distance between inner nos- 

 trils 2 



Tail: 



Height of tail where highest 3 



Breadth 2. 5 



Limbs: 



Free portion of longest fin- 

 ger 2.25 



From elbow to tip of longest 

 finger 7. 25 



Free portion of longest toe.. 2.75 



From knee to tip of longest 



tne 8. 5 



Distance between outstretch- 

 ed toes 2 4.4 



No. 4701; one specimen ; Fort Tejon, Oal.; John Xantas, 

 STEREOCHILUS Cope. 



Character. — Tougue attacbed along tlie median line to the anterior 

 margin; toes 4-5; premaxillary bones coiifiaent, with a simple si)ine, 

 without fontauelle. 



This genus is represented by but one species of the austroriparian dis- 

 trict of the nearctic region. It is evidently of aquatic habits, and is oi 

 larva-like proportions and appearance, but has the cranium fully de- 

 veloped and in some respects more solidly than its allies. In the only 

 skeleton I have examined the prefrontal is present on one side and 

 wanting on the other. The premaxillary bone is like that of Desmogna- 

 thus, while the tongue is slightly freer than in Plethodon, Tiie species 

 exhibits weak extremities. It is from southeast Georgia, and is quite 

 rare. 



Costal plica3, 17; elongate, head narrow, width more thni. seven times to. 

 groin, more than twice to axilla; no canthus rostralis; tail compressed 

 from base, fiuned; small; pale yellow, brown lined S. marginatus. 



STEREOCHILUS MARGINATUS Hallowell. 



Pseudotriton marginatus Hallow., Proceed. Ac. Nat. Sci. Phila., 1856, p. 130. 

 Spelerpes marginatus Strauch, Salam., p. 83; Boulenger, Car. Batr. Grad. Brit. Mus. 

 ed. 11, 1882, p. 64. 



This is a well-marked and peculiar species, and not nearly allied to 

 any other. Tlie head is more tliau usually elongate, witb projecting, Bat, 

 truncate muzzle. The general dimensions of the head are small ; the 

 interorbital space is narrow and nearly plane, its width between the an- 

 terior canthi of the orbits not quite 1.5 the longitudinal diameter of the 



