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



PLATE 66. 



FIG. 1. CRISTELLARIA CALCAR LINNAEUS. SEE PAGE 318. 



FIG. 2. CRISTELLARIA ECHINATA D'ORBIGNY. SEE PAGE 318. 



FIG. 3. CRISTELLARIA ACULEATA D'ORBIGNY. SEE PAGE 318. 



