INTRODUCTORY NOTE. 



J. F. Bolten's "Museum Boltenianum" is so rare 

 a tract, that in response to numerous requests we 

 have undertaken this reprint in photographic 

 facsimile. Students of the Mollusca will now 

 have ready access to the many changes of nomen- 

 clature therein contained. 



The entire process of reproduction has been most 

 carefuUy carried out by Mr. F. W. Reader, of 

 Watford, whose labours we are pleased to have 

 this opportunity of acknowledging. Owing to 

 the poor quality of the original paper and the 

 grey nature of the ink, which latter has in some 

 cases failed to print in the original, numerous 

 pages have been reproduced more than once 

 before a sufficiently satisfactory result could be 

 obtained. 



The actual copy from which this reprint has 

 been rnade formerly belonged to J. C. H. Crosse, 

 of Paris ; at his sale it passed into the hands of 

 C. Davies Sherborn, and now forms part of the 

 Geological Library of the British Museum 

 (Natural History). 



C. Davies Sherborn. 

 E. R. Sykes. 

 MarciLf 1906. 



