■j 
PLATE XI. 
Fig. I. Streptelasma vagans. lateral view, showing interior of calyx. By 
lateral view. C, view from above, the sides of the calyx having been broken away, 
showing the twisting of the septa at the center. Dayton, Ohio. Whitewater bed. 
Fig. 2. Columnaria vacua. Bardstown, Kentucky. At the base of the Liberty 
bed. 
Fig. 3. Columnaria aheolata, Goldfuss. Bardstown, Kentucky. At the base 
of the Liberty bed. 
Fig. 4. Calaposcia crihrtformisy Nicholson. Bardstown, Kentucky. Near the 
base of the Liberty bed. 
