Am. Jour. Sci., Vol. X(X, 1905. 



Plate II. 



Fig. 1, x 26 diam. 



Fig. 2, x 26 diam. 



Fig. 3, x 26 diam. 



Fig. 4, x 23 diam. 



f 



Fig. 5, x 67 diam. 



Fig. 6, x 67 diam. 



