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



PLATE 53. 



FIG. 1. LAGENA ELONGATA EHRENBERG. SEE PAGE soe. 



FIG. 2. LAGENA LONGISPINA BRADY. SEE PAGE soe. 



FIG. 3. LAGENA GRACILLIMA SEGUENZA. SEE PAGE 306. 



FIG. 4. LAGENA GL030SA MONTAGU. SEE PAGE 306. 



FIG. 5. LAGENA DISTOMA PARKER & JONES. SEE PAGE soe. 



FIG. 6. LAGENA LAEVIS MONTAGU. SEE PAGE soe. 



FIG. 7. LAGENA SULCATA WALKER & JACOB. SEE PAGE so?. 



FIG. 8. LAGENA HISPIDA REUSS. SEE PAGE 307. 



