96 OAltBONlFEROUS PEIUOD. 



CHAPTER VII 



CARBONIFEROUS PERIOD. 



PROTOZOA. 

 Class RHIZOPODA. 



Okdee FORAMINIFERA. 



Genus FUSULINA Fischer, 1837. 



Fusulina cylindrica Fischer. 

 Plate VI, fig. C a and h. 



Fusulina cylindrica Fischer, 1837, Oryct. du Gouv. de Moscon, 12G. 



Fusulina cylindrica D'Orbigiij', 1845, Geol. Euss., ii, pt. iii, IG. 



Fusulina cylindrica Owen, 1852, Geol. Siirv. Wisconsin, Iowa, and Minnesota, 131 



Fusulina cylindrica Meek and Hayden, 1859, Pioc. Acad. Nat. Sci. Phila., 20. 



Fusulina cylindrica Dana, 1862, Manual of Geology, 104. 



Fusulina cylindrica Meek aud Hayden, 1864, Paleontology Upper Missouri, 14. 



Fusulina cylindrica Meek, 1804, Paleontology of California, pt. i, i, 4. 



Fusulina cylindrica Geiiiitz, 1806, Carbonformat. uud Dyas in Nebraska, 71. 



Fusulina cylindrica White, 1870, Geology of Iowa, i, 250. 



Fusulina cylindrica Meek, 1872, United States Geol. Surv. of Nebraska, 140. 



Shell varying from terete to subglobose, assuming all intermediate 

 fusifonii shapes, generally somewhat obtusely pointed, especially the terete 

 ones, usually having the appearance of being slightly twisted at the ends ; 

 septal furrows moderately distinct, even upon unweathered specimens, 

 extending in more or less direct lines longitudinally, but are a little deflected 

 just at the ends ; centrifugal apertures about twice as high as the thickness 

 of the cell-wall covering them, moi'e than twice as broad as high, and of 

 nearly unifonii size throughovit the whole coil. The locular or external 

 aperture, since it varied with the progress of construction of the cell, and 



