Ptero. 



822 



Pterotocrinus acutus, Keyes Amer. Philos. Soc. Phila., 



Vol. 25. No. 128, page 242, fig. 4, grow- 

 ing on Platyceras chestere7ise\ fig. 5, 

 growing on another P, chesterense. 

 Subcmhoniferous limestone, XL 



Pterotocrinus {Asterocrinus) coronarius, Lyon, Geol. 



XIL 



S.SXyon. "^0^ Geol. Ky. Vol .3. 



Survey, Ky , Vol. 3, 1857, pa^e 476, plate 1, fig. 1, view of the 

 summit; la, base, natural she. Pound in the lower lime- 

 shale beds of the Millstone grit of Orittenden Co., Ky. 



Pterygotus bilobus. Hall. Pal. N. Y., ill, p. 424. L. 

 Held.— VI. ( For Hgure see poge 823.) 



Pterygotus osborni, Plall. Pal. N. Y., Vol. 3, 1859, p. 



VI. 



H. ^ Pcl\ HY Vol 3. -««m=4i^,^jps^s»p- 53^^ 



419, plate 53 A, fig. 9. Water lime. A good specimen was 



