Report of U. S. National Museum, 1397.— Flint. 



Plate 16. 



Fig. 1. REOPHAX DIFFLUGIFORMIS Brady, var. TESTACEA, new. See Page 273. 



a. Longitudinal Section. 



Fig. 2. REOPHAX DIFFLUGIFORMIS Brady. See Page 272. 



FIG. 3. REOPHAX SCORPIURUS MONTFORT. See Page 273. 



