Report of U. S. National Museum, 1897.— Flint. 



Plate 33. 



FIG. 1. GAUDRYINA SUBROTUNDATA SCHWAGER. See Page 287. 



Fig. 2. GAUDRYINA FILIFORMIS Berthelin. See page 237. 



FIG. 3. GAUDRYINA RUGOSA D'ORBIGNY. See Page 288. 



ii. Longitudinal Section. 



