388 Proceedings of the Ohio State Academy of Science. 



Surface marked by numerous rounded, radiating plications 

 which vary in size with the size of the shell. 

 Length 9-19 mm.; width 7-17 mm. 



Fig. 14. — Eumetria marcyi. A dorsal view of a completely compressed 

 and flattened specimen, which was drawn by the aid of a camera 

 lucida and which is, therefore, much broader than a normal speci- 

 men. 



This shell is readily distinguished by its ovate outline, bi- 

 convexity, and rounded, radiating plications. 



Horizon and locality. — Maxville limestone. 

 Undetermined zone : Harper Shaft, Olive Furnace. 



CLEIOTHYRTS HIRSUTA— Hall. 



1856. Spirigera hirsiita. Hall, Trans. Albany Inst., Vol. IV, p. 8. 



St. Louis limestone: Spergen Hill and Bloomington, Indiana; 

 Alton, Illinois. 



1882. Athyris hirsuta. Whitfield, Bull. Am. Mus. Nat. Hist., Vol. I, 



p. 49, pi. 6, figs. 18-21. 

 St. Louis group : Spergen Hill, Paynter's Hill and Bloomington,. 

 Indiana ; Alton, Illinois. 



1883. Athyris hirsuta. Hall, Ind. Geol. Nat. Hist., 12th Rep., p. 328, 



pi. 29, figs. 18-21. 

 St. Louis group: Alton, Illinois; Spergen Hill, Lanesville and 

 Bloomington, Indiana. 



1884. Afliyris hirsuta. Walcott, Pal. Eureka Dist., p. 222, pi. 18, fig. 5. 

 Lower Carboniferous : Nevada. 



1895.' Cliothyris hirsuta. Hall and Clarke, Pal. N. Y., Vol. VIII, pt. II, 

 pi. 46, figs. 25-28. 

 St. Louis limestone : Bloomington, Indiana. 

 1906. Cleiothyris Jiirsuta. Beede, Ind. Dept. Geol. Nat. Res., 30th Ann. 

 Rep., p. 1320, pi. 22, figs. 18-21, pi. 19, figs. 1-1 a. 

 Spergen Hill, etc., Indiana. 



