PLATE LXVII—Continued. 
CONOCARDIUM CUNEUS. 
Page 409. 
See Plates 6S, 94. 
Fig. 21. The right side of a crushed specimen. 
Fig. 22. An enlargement of the surface from the preceding-. 
Schoharie grit. Schoharie, N. Y. 
Fig. 23. An imperfect partial cast of a left valve, showing the absence of radii on the surface of the test, 
and the strong radii on the interior of the shell 
Schoharie grit. Knox, Albany Co., N. Y. 
Figs. 24-26. Ventral views of three specimens, showing the duplication of the radii towards the margin, and 
the extension of the shell beyond the umbonal ridge. 
Schoharie grit. Albany Co., N. Y. 
Fig. 27. The posterior view of a specimen showing the expansion of the shell around the periphery of the 
umbonal ridge. 
Fig-. 29. The ventral side of a specimen from which the shell is exfoliated. 
Schoharie grit. Schoharie, N. Y. 
Figs. 30, 31. The left sides of two casts of the interior. 
Schoharie g-rit. Schoharie, N. Y. 
Fig. 32. The ventral view of a specimen. 
Schoharie grit. Albany Co., N. Y. 
CONOCARDIUM CUNEUS, VHl*. TRICON ALE. 
Page 410. 
See Plates 68, 94. 
Fig. 28. Ventral view of the original specimen, which is a partial cast of the interior, retaining portions 
of the test along- the margins. 
Corniferous limestone. Canada West. 
