258 NEW YORK STATE MUSEUM 



branches each branched again on reaching the surface of the plates 

 and lay at right angles to the suture in epithecal canals developed 

 with them. The comparison of my Cliocrinus perforatus 

 with the new Cliocrinus sculpt us of Springer will show 

 how readily a species having only sutural canals could develop a 

 species with corner canals closed but with " rhombs " on the 

 sutures. 



