PLATE XCIV—Continued. 
Fig. 
Prothyris EXUTA. 
Page 462. 
9. A left valve showing the character's of this species. 
Chenrung group. Warren, Pa. 
SOLEMYA (JANEIA) VETUSTA. 
Page 463. 
See Plate 47. 
Fig. 10. The right side of a specimen preserving the shell. 
Hamilton group. Charlestown, Indiana. 
CONOCARDIUM CUNEUS, Vai\ TRIGONALE. 
Page 410. 
See Plates 67, 6S. 
Fig. 11. A right valve as obtained from-a gutta-percha impression of the natural mould, showing well- 
preserved surface markings. 
Corniferous limestone. Ontario, Canada. 
CONOCARDIUM CUNEUS. 
Page 409. 
See Plates 67, 68. 
Fig. 12. Ventral view of a cast showing the posterior expansion of the shell and the tubular tilling between 
the ventral margins of the valves. 
Schoharie grit, liondout, N. Y. 
Panenka DIOHOTOMA. 
Page 416. 
See Plate 70. 
Fig. 13. A large imperfect right valve. 
Schoharie grit. Schoharie, N. Y. 
Panenka degener. 
Page 424. 
Fig. 14. The left side of a compressed specimen. 
Hamilton group. Pratt's falls, N. Y. 
Panenka costata. 
Page 419. 
Fig. 15. A left valve showing the strong costae. 
Limestone of the Marcellus shale. Stafford, Genesee Co., N. Y. 
