328 Descriptions of New Species of Crinoidea. 



eans ; and in one place, where broken through, they are 

 seen to be disconnected almost to the inner face of the 

 substance, giving the appearance of numerous thin parallel 

 laminae. The mouth is visible in the centre of the sum- 

 mit; but the anal opening is undetermined, (though visi- 

 ble,) from imperfection in the specimen. 



Geological formation and locality. Burlington lime- 

 stone, Burlington, Iowa. Collections of C. A. Wliite and 

 B. J. Hall. 



