EXPLANATION OF PLATES. 



The following Plates, 9-13, inclusive, are illustrative of a paper on New Species 

 of Fossils from the Vicinity of Louisville, Kentucky, and the Falls of the Ohio, in the 

 24th Report on the State Museum of Natural History, pp. 181-200 a . The plates 

 were omitted in the publication of the Report for want of time for their prepa- 

 ration. Explanations refer to pages of 24th Report. 



PLATE IX. v 



ORTHIS RUG jEP 'LIC ATA H. & W. 

 Page 182. 

 Figs. 1, 2, 3. Dorsal, ventral and profile views of specimen enlarged two diam- 

 eters. 



Orthis Nisis H. & W. 



Page 181. 

 Pigs. 4-6. Dorsal, ventral and profile views of a large individual. 

 " 7, 8. Profile and dorsal views of a smaller individual 



Productus (Productella) subacvleata Murch., var. cata- 

 ract a H. & W. 



Page 198. 

 Figs. 9, 10. Ventral and profile views. 



Spirifera rostellum H. & W. 



Page 182. 

 Figs. 11-13. Dorsal, ventral and front views. 



Gyrtina crassa Hall. 



Page 198. 

 Figs. 14, 15, 16. Dorsal, cardinal and front views. 



Spirifera radiata Sow. 



Page 196. 

 Figs. 17, 18. Dorsal and ventral views of a specimen from the horizon of the 

 Clinton group, near Louisville, Ky. 



Ctrtia trapezoidalis Hisinger. 



Page 183. 

 Figs. 19, 20, 21. Dorsal, front and cardinal views of specimen. 



