Oran. 



154 



Bloomfield; (Spec. 77d-4, 16, are from Ithaca, N. Y.) VIII o. 

 — Also in Oarll & Randall's collections from Venango and War- 

 ren Co. 0. E. Hall, P. A. P. S. Jan. 5, 1876.— FZ/7-/X 



Crania leoni, Hall, 13tli Annual Report, N. Y. 1860, Che- 

 mung, Recognized by Simpson in Specimen 9569 (000) of 

 Randall's collections at Warren, Pa. in Chemung. VIII g. 



Crania lodensis. See Discina lodensis, VIII e. 



Crania modesta, White & St. John, Trans. Chicago Acad. 

 Sciences. Two under-valves attached to specimen of Athyris 

 subtilita (which see ai3ove), Collett's Indiana report of 1883, 

 plate 35, fig. 9. Coal Measures^ XIII 



Crania prima, Owen. Geol. Wisconsin, Iowa & Minnesota, 



18 5 2, 

 plate 1 

 B,fig.l3, 

 16,17,18, 

 19 ; from 

 the low- 

 est lay- 

 ers at 

 the Falls 

 of the 

 St.-Croix 



This St. Croix sandstone has always been considered to be the 

 Potsdam sandstone of the West ; but the fossil forms are dif- 

 ferent. See another Crania among the Orlicula j^rima (mid- 

 dle figure) in Owen's fig. 8 of plate 1 B. — Base of the Silurian^ 

 or top of Cambrian System. I. 



Crania setifera. See Appendix. Vh. 



Crania siluriana. See Appendix. Vh. 



Crania spinigera. See Appendix. Vh. 



Crematopteris pennsylvanica. Lesq. Geol. Pa. II, 868, 



0SH. 



