MEDINAN, NIAGARAN, AND CHESTER FOSSILS 
91 
Strophonella daytonensis Foerste 
Strophomena paten ta Hall and Whitfield, Geol. Surv. Ohio, 
Pal. 2, 1875, p. 115, pi. 5, fig. 10. 
Strophonella daytonensis Foerste, Amer. Jour. Sci., 4th ser., 
18, 1904, p. 339. 
The form figured by Hall and Whitfield is the type of Stro- 
phonella daytonesis. It is not uncommon in the Brassfield lime- 
stone of Ohio, and occurs also in Indiana and Kentucky. Figs. 
35, 36, and 37 on plate 8 of volume 2, of the Bulletin Sci. Lab. 
Denison Univ., 1887, and of plate 27 of volume 7 of the Geology 
of Ohio, 1895, may represent young individuals of this species. 
Schuchertella daytonensis Sp. nov. 
Streptorhynchus tenuis Foerste, Bull. Sci. Lab. Denison Univ., 
2, 1887, p. 105, pi. 8, figs. 31, 32, 38. 
Strophomena (Orthothetes) tenuis Foerste, Geol. Surv. Ohio, 
7, 1895, p. 568, pi. 27, figs. 31, 32, 38. 
Compared with typical tenuis (Hall), from the Waldron of 
Indiana, daytonensis is narrower and has radiating striae more 
nearly equal in size. Figure 32 on the plates cited above is the 
type. 
Orthis euorthis Foerste 
Orthis calligramma var. euorthis Foerste, Geol. Surv. Ohio, 
7, 1895, p. 572, pi. 25, figs. 12 a, b. 
The name euorthis appears in the description of the plate 
cited above, and figure 12 on this plate represents the type of 
the species. 
Orthis dinorthis Foerste 
Orthis calligramma var. dinorthis Foerste, Geol. Surv. Ohio, 
7, 1895, p. 572, pi. 31, figs. 4, 5. 
The name dinorthis appears in the description of the plate 
cited above, and figures 4 and 5 on this plate represent the 
types of the species. 
