Fossil Footmarks found in Westmoreland County, Pa. 343 



Fig. E. Rhizosolenia ! ? Fossil at Bermuda. 



Fig. F. Goniothecium Odontella, Ehr. Fossil at Bermuda and Vir- 

 ginia. 



Fig. G, Zygoceros ? Bipons, Ehr. Fossil at Bermuda. 



Figs. 24 and 24a. Biddulphia or Denticella, new species. Fossil at 

 Brown's Mills, near Westmoreland Court House, Va. 



Fig. 25. Triceratium , new species .? Fossil at Meherrin 



River, recent in Charleston harbor. 



Fig. 26. Goniothecium .'' , new genus } Fossil at Bermuda, 



Rappahannock Cliffs, Brown's Mills, &c. 



Fig. 27. Lithocampe , new species } Fossil at Piscata- 



way, Md. 



Fig. 28. Stauroptera , new species .? Fossil at Meherrin 



River, Va, 



Fig. 29. Dicladia , new species } Recent in New Haven har- 

 bor. Conn. 



Fig. 30. Cast of a fossil Polythalamian shell. Petersburg, Va. 



Fig. 31. Cast of a fossil Polythalamian shell. Fort Washington, Va. 



Fig. 32. Scale showing y^g-ths of a millimetre, magnified equally 

 with the drawings. 



Art. XII. — Description of Fossil Footmarks, found in the Car- 

 boniferous Series in Westmoreland County, Pennsylvania; 

 by Alfred T. King, M. D. 



Remarks. — After this article was in type, the Proceedings of 

 the Academy of Natural Sciences of Philadelphia, for November 

 and December, 1844, reached us with the same accoimt of these 

 footmarks from Dr. King, which he had sent for this Journal, 

 except a substitution of the generic name Thenaropus for some 

 of the tracks included. A later communication from Dr. King, 

 accompanying a drawing of the slab, figured in parts, on pp. 350, 

 351, desires us to change again the name Thenaropus — which 

 we have accordingly done, taking the liberty however of abbre- 

 viating his proposed name Spheropezopus to Spheropezium. 

 Dr. K. desires that the name Thenaropus (T. heterodactylus) 

 may be given to the supposed Batrachian tracks. Yet we would 

 suggest the propriety of his adopting some new name, as a new 

 use of this word will only create increased confusion. We have 

 ventured«also to make some condensation of the original matter, 

 which is published in full in the Proceedings referred to. — Eds. 



