' Dirritksions. —Length, 0.20 of an inch; width, 0.18. 
The Elceacrinus EirJcwoodensis is nearly allied to E. 
(Pentremites) melo , from which it is distinguished by its 
much smaller size and legs' d'eeply-excavated base. It also 
occupies a higher geological position. 
Occurs in the St. Louis Limestone (Carboniferous) on the 
Pacific railroad near Kirkwood, St. Louis-county, Missouri.- 
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