CEPHALOPODS. 221 



Goniatites osagensis SWALLOW. 



Goniatites osagensis Swallow, 1860 : Trans. St. Louis Acad. Sci.. vol. I, p. 

 659. 



Shell small, with regularly rounded volutions; umbilicus 

 small. 



Horizon and localities. Lower Carboniferous, Chouteau 

 limestone : Cooper county ; Burlington limestone : Louisiana. 



Goniatites planorbiformis SHUMARD. 



Goniatites planorbiformis Shumard, 1855: Geol. Sur. Missouri, Ann. Rep , 

 p. 208, pi. C, figs, lla-b. 



Shell minute, volutions about six in number, broad, regu- 

 larly rounded ; umbilicus very broad. 



Horizon and localities. Upper Carboniferous, Upper Coal 

 Measures : Kansas City. 



Goniatites politus SHUMARD. 



Goniatites politus Shumard, 1858 : Trans. St. Louis Acad. Sci., vol. I, p. 

 199. 



A very small, compressed form, with volutions embracing 

 and showing only the outer whorl. Surface highly polished. 



Horizon and localities- Upper Carboniferous, Upper Coal 

 Measures: Lexington. 



Goniatites minimus SHUMARD. 



Goniatites minimus Shumard, 1858: Trans. St. Louis Acad. Sci., vol. 1, 

 p. 200. 



A very minute shell, similar to O. politus but much more 

 robust. 



Horizon and localities Upper Carboniferous, Upper Coal 

 Measures : Dover landing ( Lafayette county ), Kansas City. 



Nautilus? burlingtonensis (OWEN). 



Gyroceras burlingtonensis Owen , 1852 : Geol. Sur. Wisconsin , Iowa and Min- 

 nesota, p..581, tab. v, fig. 10. 



Nautilus burlingtonensis Miller, 1883 : Cat. Am. Pal. Foss., p. 307. 



? Solenochilus blairi Miller, 1892 : Geol. Sur. Indiana, 18th Ann. Rep., p. 

 75, pi. xii, fig. 2. 



A large robust form with rapidly increasing whorls, and 

 gently curving suture lines. 



