202 GASTEROPODS. 



Aclisina?? bellilineata MILLER. 



Aclisina bellilineata Miller, 1891: Geol. Sur. Indiana, 17ch Ann. Kept., 

 Adv. sheets, p. 85, pi. xiv, fig. 10. 



Horizon and Localities. Lower Carboniferous, Kinder- 

 hook limestone : Sedalia. 



Aclisina minuta (STEVENS). 



Adisminuta Stevens, 185S: Am. Jour. Sci., ( 2 ), vol XXV", p. 259. 

 Murchisonia minima Swallow, 1858: Trans, tit. Louis Acad. Sci., vol. I, 



p. 203. 

 Aclisina minuta de Koninck, 1881: Ann. de Mus. Roy. d'Hist. Nat. de la 



Belgique, t. VI, p. 86. 



Aclisina minuta Keyes, 188S : Proc. Acad. Nat. Sci., Phila., p. 240. 

 Aclisina minuta Keyes, 1891: Proc. Acad. Nat. Sci., Phila., p. 259. 



Shell minute, turreted, composed of rine or more volutions. 

 Whorls regularly convex ; suture deeply impressed. Aperture 

 subcircular. Surface ornamented by numerous fine revolving 

 lines. 



Horizon and localities. Upper Carboniferous, Upper Coal 

 Measures: Lexington. 



Aclisina stevensana (MEEK & WORTHEN). 



Turritella stevensana Meek & Worthen, 1866: Geol. Sur. Illinois, vol. II, 

 p. 382, pi. xxvii, figs. 8-18a. 



Shell much like A. minuta, but considerably larger, with 

 fewer revolving lines of ornamentation. 



Horizon and localities Upper Carboniferous, Upper Coal 

 Measures: Kansas City. 



Aclisina robusta (STEVENS). 



Aclisrobusta Stevens, 1858: Am. Jour. Sci., (2), vol. XXV, p. 259. 

 Aclis robusta Meek & Worthen, 1873: Geol. Sur. Illinois, vol. V, p. 596, 



pi. xxix, figs. 6a-b. 

 Aclisina robusta Keyes, 1888: Proc. Acad. Nat. Sci., Phila., p 240. 



Like A. minuta, but much shorter, and with three or four 

 volutions less. 



Horizon and localities. Upper Carboniferous, Upper 

 Coal Measures : Kansas City. 



