GASTEROPODS. 213 



Soleniscus fusiformis White, 1884: Geol. Sur. Indiana, 13th Ann. Rep., pt. 



ii, p. 154, pi. xxxiv, figs. 1, 5. (Not Hall, 1858.) 

 Soleniscus newberryi White, 1884: Geoi. Sur. Indiana, 13th Ann. Rep., 



pt. ii, p. 153, pi. xxxiv, tigs. 7, 8. 



Macrochilus newberryi Keyes, 1888: Proc. Acad. Nat. Sci. , Phlla. t p. 240. 

 Soleniscus newberryi Keyes, 1889 : Am. Naturalist, vol. XXIII, p. 423, pi. 



xx, fig. 5. 



Soleniscus newberryi Keyes, 1889 : Proc. Acad. Nat. Sci. s Phila., p. 308. 

 Soleniscus newberryi Keyes, 1891 : Proc. Acad. Nat. Sci. , Phila. , p. 260. 



Shell thick, fusiform; spire equaling half the length of 

 the shell, with the apex somewhat attenuated. Volutions 

 seven to nine in number, the body-whorl being only moderately 

 ventricose; outer lip thin, inner lip more or less callous. Colu- 

 mella slightly bent, with an obtuse fold anteriorly, which 

 becomes more angular as it passes inward, and has a deep, 

 broad furrow .behind it. In front of the fold, and between it 

 and the front border of the aperture, there is a narrow concave 

 space, or short canal. Surface glabrate, marked only by fine 

 lines of growth. 



Horizon and localities Upper Carboniferous, Upper Coal 

 Measures: Kansas City. 



Sphaerodoma penguis (WINCHBLL). 







Macrochilus pengue Winchell, 1863 : Proc. Acad. Nat. Sci., Phila., p. 21. 

 Sphcerodoma penguis Keyes, 1889: Proc. Acad. Nat. Sci., Phila., p. 296. 

 Macrochilina penguis Miller, 1890: N. A. Geol. and Pal., p. 409. 



Shell similar to Sph. ponderosa, but smaller and more 

 slender. 



Horizon and localities. Lower Carboniferous, Burlington 

 limestone : Louisiana. 



Sphaerodoma ponderosa (SWALLOW). 



Macrochilus ponderosum Swallow, 1858: Trans. St. Louis Acad. Sci., vol. 



II, p. 202. 

 Macrochilus texanum Shumard, 1858: Trans. St. Louis Acad. Sci., vol. I, 



p. 204. 

 Soleniscus (?) ponderosus White, 1884 : Geol. Sur. Indiana, 13th Ann. 



Rep., p. 156, pi. xxxiv, figs. 1-2. 

 Soleniscus texanus White, 1884: Geol. Sur. Indiana, 13th Ann. Rep., pt. 



ii, p. 155, pi. xxxiv, figs. 13-14. 



Sphcerodoma texanus Keyes, 1889: Proc. Acad. Nat. Sci., Phila., p. 306. 

 Sphcerodoma ponderosum Keyes, 1889: Proc. Acad. Nat. Sci., Phila., p. 



306. 



