Review of the New York Geological Reports. 69 
reference, has been usually regarded as the Cyathophyllum heli- 
anthoides of Goldfuss, which is also given as a synonym of the 
New York fossil. Like this Hamilton species the lamella of the 
western coral proceed from the centre, and no transverse lamin 
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are observable towards the axis, when ground down. ‘The lam- 
ella do not appear however to be denticulate, but neither the 
figure nor the description of Goldfuss denote this as a distinctive 
character of C. helianthoides. Following Lonsdale’s definition 
