JepoftofU. 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 Pa&e 273. 



