PLATE XXVIII 
Fig’S. 1 A, B. Diestcceras eos (Hall and Whitfield). Opposite sides of 
the same specimen. Ventral side assumed to be near left side of A, and 
right side of B. From vicinity of Dayton, Ohio, assumed to be from basal 
part of Whitewater member of Richmond. Type, numbered 3082, in the 
Geological Museum of Ohio State University. Same specimen as that 
figured in Ohio Pal., 2, 1875, pi. 3, fig. 5. 
Figs. 2 A, B. Loxoceras distans McCoy. A, lateral view with ventral 
side on right. B, cross-section, with lateral diameter larger. Copied from 
McCoy, Carb. Foss. Ireland, 1844, pi. 4, fig. 1. From the Carboniferous. 
Fig. 3. Lituites sp. Vertical section through a fragment, from a large 
series of specimens from Esthonia, in the U. S. National Museum. 
