THIS Catalogue is published with the three-fold object 

 of affording a guide to the collection ; of making known its 

 deficiencies (which are many,) ; and to show what the 

 Museum has to offer in exchange for shells not yet in the 

 collection. 



Those species of which there are duplicates are marked 

 with one, two, or three asterisks ; the first indicates that 

 the number is very limited ; the second that it is greater ; 

 and the third that a considerable number is available for 

 exchange. 



Examples of shells not in this Catalogue will be thank- 

 fully received either as donations or in exchange. 



J. MITCHELL, CAPTAIN, 



Superintendent. 

 MADRAS, 1 5th May 1867. 



M90616 



