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  Mcyr 
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  So, 
  

  

  HARVARD 
  UNIVERSITY 
  

  

  • 
  fr- 
  

   7 
  ^ 
  

  

  LIBRARY 
  

  

  OF 
  THE 
  

  

  DEPARTMENT 
  OF 
  MOLLUSKS 
  

  

  IN 
  THE 
  

  

  Museum 
  of 
  Comparative 
  Zoology 
  

   Gift 
  of: 
  

  

  Fkicharc 
  VV. 
  Fos 
  ter 
  

  

  