THE OTTAWA NATURALIST. 



VOL. XXVI. PLATE III, 



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6- -6 







v m 



3 , A : 5 * 



* 



(J) 



6 ? 



tSXM. 



Different views o) portions of the disi Protopalceaster narrawayi, 



Hudson, enlarged nearlj nine and a half diameters. Millimeter scale at the right. 

 Photomicrographs for figures 1. 2 and 3 were made under gum and coverglass. 



