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NEW YORK STATE MUSEUM 



PLATE 9 



Clionolithes priscus (McCoy). A specimen of 

 Leptostrophia magnifica Hall, from the 

 Grande Greve limestone (Lower Devonic) of Gasp^ with 

 several straight clavate tubes extending in from the margin 

 of the shell. Where the shell substance has disappeared 

 at the right of the specimen are seen numerous examples 

 of the branched boring, Clionolithes radicans. 



Clionolithes radicans. An etched specimen of 

 an old shell of the brachiopod Dalmanella super- 

 s t e s H. & C. of the Chemung shales of New York with 

 a multitude of irregularly branching borings riddling the 

 shell and apparently starting inward from the shell margin. 

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