10 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8o 



The tracks occur in Noble's subdivision B of this formation, and he 

 is inclined to regard the entire Supai as of Pennsylvanian age. The 

 fossil tracks so far collected are all new genera and species and offer 

 no evidence bearing on this question. 



The ichnite fauna of the Supai sandstone as known at this time 

 consists of the following described genera and species : 



VERTEBRATES 



Anomalopus sturdevanti n. gen., n. sp. 

 Stenichnus yakicnsis n. gen., n. sp. 

 Tridentichnus supaictisis n. gen., n. sp. 



LIST OF DESCRIBED TRACKS FROM THE CARBONIFEROUS OF 

 NORTH AMERICA 



The following list of Carboniferous footprints is a complete roster 

 of all tracks described up to the present time. This list, consisting 

 of 34 genera and 60 .species, is badly in need of revision, a task that 

 would doubtless decrease rather than increase the totals given. In 

 order to add to its value as a reference list, the geological horizon and 

 general locality of each is recorded. The geological occurrence of 

 many of the earlier described species was given as Coal Measures, 

 but in the present list, in so far as I have been able, I have 

 made more precise assignment of these, following the more recent 

 age determinations. 



Name Horizon Locality 



Agostopus matheri Gilmore Permian (Coconino) .Grand Canyon, Ariz. 



AIlopus ? arizonae Gilmore Permian (Coconino) .Grand Canyon, Ariz. 



Allopus ? littoralis Marsh Pennsylvanian Osage Co., Kans. 



Anomoepus ? culbertsonii (King) .Coal Measures Westmoreland Co., Pa. 



Anomoepus ? gallinuloides Coal Measures Westmoreland Co., Pa. 



(King). 

 Anthracopus ellangowensis Pennsylvanian Mahanoy Coal Field, 



Leidy. Pa. 



Asperipes avipes Matthew Coal Measures Joggins, Nova Scotia. 



Asperipes caudifer (Dawson) ... .Coal Measures Joggins, Nova Scotia. 



Asperipes flexilis Matthew Coal Measures Joggins, Nova Scotia. 



Barillopus arctus Matthew Coal Measures Joggins, Nova Scotia. 



Barillopus confusus Matthew. . . .Coal Measures Joggins, Nova Scotia, 



Barillopus unguifer Matthew Coal Measures Joggins, Nova Scotia. 



Baropezia abcissa Matthew Coal Measures Joggins, Nova Scotia. 



Baropezia eakini Gilmore Permian (Coconino) .Grand Canyon, Ariz. 



Baropezia sydnensis (Dawson) . . .Coal Measures Sydney, Nova Scotia. 



Baropus lentus Marsh Pennsylvanian Osage Co., Kans. 



Barypodus palmatus Gilmore Permian (Coconino) .Grand Canyon, Ariz. 



