PLATE LXXIX. 
Cypricardinia planulata. 
Page 484. 
Figs. 1, 2. A right and a left valve of this species. 
Schoharie grit. Schoharie, N. Y. 
Fig. 3. A cast of a right valve showing muscular scars and pallial line. 
Schoharie grit. Schoharie, N. Y. 
Figs. 4, 5. Cardinal view and left side of a specimen showing the inequality of the valves and muscular scars. 
Schoharie grit. Schoharie, N. Y. 
Cypricardinia indenta. 
Page 485. 
See Plate 96. 
Figs. 6-8. Right and left valves showing' the usual form of the species, enlarged to two diameters. 
Comiferous limestone. Babcock's hill, Oneida Co., iV. Y. 
Fig. 9. An elongate right valve, enlarged to two diameters. 
Fig. 10. A right valve, enlarged to three diameters. 
Fig. 11. A left valve. 
Fig. 12. A right valve, natural size. 
Fig. 13. A small left valve, enlarged to three diameters. 
Fig. 14. A right valve, enlarged to three diameters, showing the surface markings. 
Hamilton group. Ontario Co., N. Y. 
Fig. 15. An elongate left valve, enlarged to two diameters. 
Hamilton group. Shore of Canandaigua lake, N. Y. 
Fig. 16. A left valve, similar to the preceding, natural size. 
Hamilton group. Shore of Owasco lake, N. Y. 
Fig. 23. A right valve preserving the test and surface markings. 
Hamilton group. Moscow, N. Y. 
Cypricardinia arcuata. 
Page 486. 
Fig. 17. A left valve of this species, enlarged to two diameters. 
Chemung group. Near Elmira, N. Y. 
