PLATE LXXXIV— Continued. 
Actinopteria aueiculata. 
Page 121. 
Fig-. 15. The left valve described showing the large anterior ear. 
Chemung group. Laiorenceville,TiogaCo.,Pa. 
Actinopteria Boydi. 
Page 113. 
See Plate 19. 
Fig. 16. The left valve of the specimen figs. 26, 28, 29, plate 19, redrawn to show the pallial line and 
muscular impressions. 
Hamilton group. Cazenovia, N. Y. 
Fig. 17. A small right valve showing the hinge characters, pallial line and muscular impression. This 
figure is the natural size of the.specimen represented in figure 12, plate 19. 
Hamilton group. Hamilton, Madison Co., N. Y. 
Actinopteria theta. 
Page 125. 
Figs. 18, 19. The right and left valves of the specimen described. 
Chemung group. Ithaca, N. Y. 
Ectenodesma birostratum. 
Page 242. 
See Plate 23. 
Fig. 20. The left val.ve represented on plate 23, fig. 30, redrawn to show the extent of the wings. 
Chemung group. Franklin, Delaware Co., N. Y. 
Pterinea Ciiemungensis. 
Page 98. 
See. Plate 16. 
Fig. 21. A large left valve of this species showing the form of the shell and the interrupted rays with the 
fine concentric strise of the surface. 
Chemung- group. Near Bath, N. Y. 
Pterinea intersteialis. 
Fig. 22. An imperfect left valve. 
Chemung group, 
Page 96 
Chemung Narrows, N. Y. 
Pterinea consimil'is. 
Page 100. 
See Plate 16. 
Fig. 23. A left valve showing the ligamental area, cardinal and lateral teeth, pallial line and muscular 
impression. Some portions of the test are remaining on the lower half of the valve. 
Chemung group. Tioga Co., N. Y. 
Pterinea (Vertumnia) reversa. 
Page 104. 
See Plate 24. 
Fig. 24. The specimen represented on plate 24, fig. 6, redrawn to show the absence of strong rays on the 
. wing. 
Chemung group. Elmira, N. Y. 
