148 SMITIISONIAN institution' 



PLATE LXXI 

 (All figures natural size except where otherwise stated) 



PAGE 



Figs. I, 2. Onychocrinus exsculptus Lyon and Casseday 430 



(Also on Plates LXIX and LXX) 



Figs, i, 2. Two specimens lying side by side on a slab. One is very large, with stem and root 

 complete — about 20 inches long — and the other smaller, with stem nearly complete, 

 and showing small cirri from a greater distance from the root than the former. 

 Both are mature specimens, with short columnals throughout the stem. The figures 

 are reduced to nearly one-half diameter, as shown by scale accompanying. Author's 

 collection. 



Keokuk Gr. : Lower Carboniferous. Crawfordsville, Indiana. 



