PLATE LX. 
Grammysia alveata. 
Page 370. 
See Plate 57. 
Fig. 1. The left side of a specimen retaining both valves. 
Hamilton group. Madison Co., IV. Y. 
Figs. 2-4. Left side, anterior and cardinal views of a specimen retaining its natural proportions. 
Hamilton group. Schoharie Co., N. Y. 
Fig. 5. Cardinal view of a specimen which is vertically compressed. 
Fig. 6. The right side of a specimen preserving nearly the normal form. 
Hamilton group. Madison Co., N. Y. 
Fig. 7. The cardinal area of a left valve. 
Hamilton group. Otsego Co., N. Y. 
Fig. 8. A left valve preserving the normal form. 
Hamilton group. Madison Co., N. Y. 
Figs. 9, 10. Left side and anterior end of a large individual with sharp and distinct concentric folds. 
Hamilton group. Schoharie Co., JV. Y. 
Fig. 11. The left side of a compressed specimen fig. 1 of plate 57. 
