Pygidium quite short, and, in outline, much like a double 

 convex lens. It is not trilobate. 



It is unnecessary to compare it with any other described 

 species, for the purpose of distinguishing it. 



Found in the Niagara Group, at Bonfield, near Kankakee, Illi- 

 nois, and now in the collection of Wm. F. E. Gurley. The specific 

 name is in honor of L. E. Daniels, of Mazon, Illinois, an active 

 collector, who discovered the epecies. 



