THE STONE LILIES 



long ago as the seventeenth century, many 

 years before they were found in the living 

 state. They are a kind of star-fish, with long 

 delicate arms attached to a central cup or body 



Fig. 214. — Slab containing Pentacrinus hemeri. The stalks 

 are sometimes eighteen feet in length. (Photograph lent 

 by Dr. Bather). 



which is mounted on a jointed stem, which 

 is often of great length. Several kinds 

 are shown in the figures 214, 215, 216. The 

 fossil remains which we find are the hard in- 



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