MEDINAN, NIAGAEAN, AND CHESTEK FOSSILS 
51 
To the brief list of fossils from the Whirlpool sandstone pub- 
lished by Dr. Williams we here add a few obtained in the quarry 
a quarter of a mile west of the railroad station at Credit Forks, 
in southern Ontario. This quarry is located immediately 
north of a deep ravine crossing the railroad south of the station. 
The fossils were found in thin sandstone layers at the top of the 
Whirlpool sandstone, immediately under the basal layers of 
Manitoulin dolomite, in which specimens of Leveilleites were 
found. Several of these additional species from the Whirlpool 
sandstone evidently are merely earlier occurrences of forms 
already known from the Grimsby sandstone, in the upper part 
of the Medinan. 
While some of these specimens are not sufficiently well pre- 
served to serve as types of new species, they clearl}^ indicate the 
presence in the Whirlpool sandstone of a much larger fauna than 
suspected formerly. 
The list of species from the Whirlpool sandstone at Credit 
Forks is as follows: 
1. Lingula cf. cuneata Conrad 
2. Dalmanella eugeniensis Williams 
3. Schuchertella creditensis Sp. nov. 
4. Whitfieldella circularis Sp. nov. 
5. Modiolopsis orthonota creditensis Var. nov. 
6. Ctenodonta (?) sp. 
7. Ctenodonta (?) creditensis Sp. nov. 
8. Ctenodonta (?) cataractensis Sp. nov. 
9. Liospira (?) sp. 
1. Lingula cf. cuneata Conrad 
Plate XIII, fig. 9 
Lingula cuneata Conrad, 3d Ann. Rep. Geol. Surv. New York, 
1839, pp. 63, 64; Hall, Pal. New York, 2, 1852, p. 8, pi. 4, fig. 2e. 
Specimen 10 mm. long, 6.5 mm. wide, ovate in outline, and 
pointed toward the beak; with a convexity slightly exceeding 1 
mm. The general outline agrees more closely with that of figure 
2e on the plate in the Paleontology of New York, cited above. 
