218 PTEEOPODS. 



Conularia osagensis SWALLOW. 



Conularia osagensis Swallow, 18d3 : Trans. St. Louis Acad. Sci., vol. IU 

 p. 98. 



A large form with narrow transe verse costre. 

 Horizon and localities. Lower Carboniferous, Keokuk 

 limestone : Boonville ( Cooper county ). 



Conularia subcarbonaria MEEK <fe WORTHEN. 

 Conularia subcarbonaria Meek & Worthea, 1865: Proc. Acad. Nat. Sci., 



Phila., p. 253. 

 Conularia subcarbonaria Meek & Worthen. 1873 : Geol. Sur. Illinois, vol. V r 



p. 520, pi. xix, fig. 4a-c. 



Another large form with very fine, crenulated costse. 

 Horizon and localities. Lower Carboniferous, Keokuk 

 limestone : Wayland ( Clark county ). 



Conularia missouriensis ? SWALLOW. 



Plate xxxv, figs. la-b. 

 Conularia missouriensis Swallow, 1860: Trans. St. Louis Acad. Sci., p. 



657. 



Conularia missouriensis Meek & Worthen, 1873 : Geol. Sur. Illinois, vol. 

 V, p. 641, pi. xxii, figs. 5a-b. 



Very large, elongated, four-sided, pyramidal, with two op- 

 posite sides wider than the other two; cross-section rectangu- 

 lar. Angles at the four corners deeply furrowed longitudinally ; 

 sides without distinct median groove. Surface marked by sharp 

 prominent transverse ribs, which are about half as wide as the 

 rounded furrows between ; these curve more or less toward 

 the aperture. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone: Saint Louis; KeokuU limestone: Warsaw (Illinois). 



Conularia subulata HALL. 



Conularia subulata Ball, 1856: Trans. Albany Inst., vol. IV, p. 32. 

 Conularia subulata Whitfield, 1832 : Am. Mus. Nat. Hist., Bui. 3, p. 91, pi. 



viii, fig. 3. 

 Conularia subulata Hall, 1883 : Geol. Sur. Indiana, 12th Ann. Kept., p. 



372, pi. xxxi,fig. 3. 



A small form with closely arranged ribs. 

 Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



