DESCRIPTION OF SPECIES 153 



Genus Fusulina Fischer 



Fusulina secalica (Say) 

 PI. VI, fig. 3 



1837 Miolites secalicus. Say, Long's Exped., p. 151 (Footnote). 



1837 Fusulina cylindrica. Fischer, Oryct. du Gouv. Mascou, p. 126, PL 18, Figs. 1-5. 

 1900 Fusulina secalica. Beede, Geol. Sury. Kansas, Vol. IV, p. 10, PI. 1, Fig. 1. 

 Coal Measures: Kansas. 



Remarks. This widespread Pennsylvania!! Foraminifera is com- 

 mon in the flinty phase of the Upper Mercer member of east-central 

 Ohio. Although entire specimens are sometimes obtained, the form 

 is seen most often on freshly chipped fragments of flint as sections 

 broken at various angles. These sections show remarkably well the 

 coiled, chambered condition of the interior. The form ranges from 

 the Lower Mercer limestone in the middle part of the Pottsville forma- 

 tion to the Black Flint member at the top, where it is present in the 

 flinty phase. In both the Lower Mercer and Black Flint members, 

 however, it is of rare occurrence. 



Dimensions. A specimen of average size measures: length 3.5 

 mm., width 1.2 mm. 



Horizon and locality. Lower Mercer limestone: Muskingum 

 County, Localities 27, 28, 44, r; Licking County, Locality 48, r. Of- 

 wide distribution in the Upper Mercer flint of east-central Ohio, c. 

 Black Flint member: Jackson County, Locality 88, c; Vinton County, 

 Locality 90, r. 



Girtyina ventricosa (Meek and Hayden) 

 PL VI, fig. 4 



1858 Fusulina cylindrica var. ventricosa. Meek and Hayden, Proc. Acad. Nat. Sci. 



Phil., p. 261. 



Carboniferous: Juniata and Manhattan, Kansas. 

 1900 Fusulina secalica var. ventricosa. Beede, Geol. Surv. Kansas, Vol. VI, p. 10. 



(See notes en Fusulina secalica [Say]). 



Remarks. Girtyina ventricosa is found associated with Fusulina 

 secalica (Say) in the flinty phase of the Upper Mercer member. Longi- 

 tudinal and transverse sections show excellently on freshly broken 

 fragments of flint. The short, extremely convex external form presents 

 a striking contrast to the more slender outline of F. secalica. All the 

 specimens examined are unusually small. 



Dimensions. Length 3 mm., width about 2 mm. 



Horizon and locality. Widely distributed throughout the flinty 

 phase of the Upper Mercer member in east-central Ohio. 



