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



PLATE 49. 



FIG. 1. PENEROPLIS PERTUSUS FORSKAL, VAR. DISCOIQZUS, NEW. SEE PAGE 304. 



a. Incomplete Section. 



FIG. 2. PENEROPLIS PERTUSUS FORSKAL. (.BY TRANSMITTED LIGHT.) SEE PAGE 304. 



