358 E. B. BRANSON 



and left feet is 35 mm. and between the outer parts 90 mm. No im- 

 pression of a tail is present. 



The photograph reproduced in Fig. i is of that part of the slab 

 showing only impressions of the hindfeet, but opposite the posterior 

 impression a fragment from farther forward containing a track of the 

 left forefoot is inserted. All of the feet have the heel impression 

 shown rather indistinctly. The photograph shows the impressions 

 of the hindfeet just behind the place where impressions of the forefeet 

 appear. 



It hardly seems worth while to attempt to classify the specimen 

 under discussion but such an attempt may lead to a better understand- 

 ing of its relationships. Using Matthew's classification it should be 

 referred to the genus Dromopus, and the specific name aduncus is 

 suggested, referring to the inward bending of the outer ends of the 

 inner toes. 



Amphibian footprints have been recorded from the Mississippian 

 of America as follows: 



Paleosauropus primevus Lea from the Mauch Chunk near Potts- 

 ville, Pennsylvania, about 700 feet from the top of the formation 

 (Proceedings of the American Philosophical Society, IV [1849], 91-94} 

 one figure). 



Three unnamed varieties from about 2,200 feet from the top of the 

 Mauch Chunk of Pennsylvania (Rogers, Geology of Pennsylvania, 

 Part II [1856], 831). 



Hylopus hardingi Dawson and Hylopus logani Dawson from the 

 Subcarboniferous of Nova Scotia (Transactions of the Royal Society 

 of Canada, XII, sec. iv [1894], 78). 



One form from "not far from the horizon of Sauropus primaevus" 

 in Pennsylvania (J. Barrell, Bulletin of the Geological Society of 

 America, XVIII [1907], 460). 



