I58 NEW YORK STATE MUSEUM 



edges; two or three thin joints between thick ones; articulating sur- 

 faces of joints deeply striated radially from margin nearly to the 

 canal; canal pentapetalous; calyx subcylindric or ovoid, gradually 

 enlarging from base upward to commencement of arms, then dimin- 

 ishing; summit contracted; surface of plates generally smooth. 



'v 



Fig. 53 Eucalyptocrinus decorus 



Found in the lenses of limestone in the upper Clinton and in the 

 calcareous beds of the lower Rochester shale, as well as the Bryo- 

 zoan bed at Niagara. Often plentiful but generally in dissociated 

 plates, of which the interbrachial partition plates are most readily 

 recognized. The " roots " are occasionally found attached to corals, 

 etc. Also represented in the middle and upper limestones at Ni- 

 agara, but generally replaced. Also in the shale at Lockport and 

 other localities (Hall). 



