388 Proceedings of the Ohio State .Iccideiny 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. — Eiimetria niarcyi. 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 b}- its ovate outline, bi- 

 convexity, and rounded, radiating ])lications. 



Horizon and locality. — Ma.xville limestone. 

 Undetermined zone : Harper Shaft. Olive Furnace. 



CLEIOTHYRTS HIRSUTA-Hall. 



1856. Spirigera hirsuta. Hall, Trans. Albany Inst., Vol. IV, p. s'. 



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

 -Alton, Illinois. 

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

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

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

 Indiana; .Alton, Illinois. 

 188.3. Athyris hirsuta. Hall, Ind. Geol. Xat. Hi.st., li'th Rep., p. 328, 

 pi. 29, figs. 18-21. 

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

 Bloomington, Indiana. 

 1884. Athyris hirsuta. Valcott. Pal. Eureka Dist., p. 222, pi. 18, fig. o. 



Lower Carboniferous: Xevada. 

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

 pi. 4(1, figs. 25-28. 

 St. Louis limestone : Bloomington, Indiana. 

 1900. Cleiothyris liirsuta. Beede, Ind. Dept. Geol. X'at. Res., S^th Ann. 

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

 Spergen Hill, etc., Indiana. 



