PLATE XCII. 
Limoptera cancellata. 
Page 244. 
See Plate 26. 
Pigs. 1, 2. Two small left valves differing in the frequency of the radii. 
Hamilton group. Falls of the Ohio. 
Fig. 3. The left side of the original specimen, redrawn to show the restored outline, the pallial line and 
muscular impression. 
Hamilton group. Falls of the Ohio. 
Limoptera macroptera. 
Page 246. 
See Plates 24, 26, 27, 28 and 29. 
Fig. 4. A small gibbous left valve showing numerous fine radii. 
Hamilton group. Delphi, Onondaga Co., N. Y. 
Figs. 5, 6. The right and profile views of a small specimen showing the form and convexity of the shell. 
Hamilton group. Pratt's falls, Onondaga Co., N. Y. 
Fig. 7. An outline of a large right valve. 
Hamilton group. Schoharie Co., N. Y. 
Fig. 8. A left valve preserving very marked surface characters. 
Hamilton group. Delphi, N. Y. 
Fig. 9. A right valve showing the marked radii on the umbonal region and their gradual obsolescence 
toward the margin of the valve. The hinge preserves the striated ligamental area, the 
oblique lateral teeth and three obscure cardinal folds anterior to the beak. 
Hamilton group. Pratt's falls, Onondaga Co., N. Y. 
Limoptera obsoleta. 
Page 249. 
See Plates 26 and 29. 
Fig. 10. A large left valve, showing the form and surface characters and a portion of the ligamental area. 
Hamilton group. Pratt’s falls, Onondaga Co., N. Y. 
