The Fauna of the Maxi'illc Limestone. 



405 



1895. Bellerophon subkcvis ? Whitfield, Geo). Surv. Ohio, \^3l. VII, p. 

 479. pi. 10, figs. 20, 21. 

 Maxville limestone : N^ewtonville and Maxville, Ohio. 

 1897. Bellero/^hon sublccvis. Weller, Trans. X. Y. Acad. Sci., Vol. XVI,. 

 p. 269, pi. 21, fig. 10. 

 Batesville sandstone : Batesville, Arkansas. 

 1900. Bellerophon siiblccvis. Cumings, Ind. Dept. Geol. Nat. Res., 30th 

 Ann. Rep., p. 1360, pi. 25, figs. 6, 7. 

 Salem limestone: Spergen Hill, Bloomington, Indiana; Alton, 

 Illinois. 

 1909. Bellerophon suhhcvls. Grabau and Shimer, N. A. Index Foss., p. 

 620, fig. 832. 

 St. Louis and Chester group: Indiana, Illinois, Ohio, Missouri,. 



Arkansas. 

 Lower Coal Measures: Pennsylvania. 



Deseription. — Shell subglobose witli three whorls of which 

 the last or body whorl is moderately e.xi)anded. The inner 

 whorl projects into and strongly modifies the a]jerture which' is 

 transversely kidney-shaped. Outer lip both thick and somewhat 

 reflected at the junction with the body of the shell. Umbilicus 

 not developed. Anterior portion of bod_\' \\h()rl keeled in the 

 best preserved sjjecimens. 



Fig. 29. — Bellerophon sublccvis. 



a and b. — Back and profile views of the same specimen from which 

 the shell is mostly removed. (After Whitfield.) 



Surface of nearly all of the Maxville specimens not pre- 

 served. However, one or two show the surface to be crossed by 

 fine transverse striae, which bend abniptly backward over the 

 keel as described by Hall (1858). 



Greatest diameter 15-26 mm. 



The shell is characterized by its subglobose outline and 



