PREFACE. 



In submitting the following SUPPLEMENT to the Public, 

 it will be proper to remarl , that the plan pursued in the Index 

 Testaceologicus has been continued for the sake of uni- 

 formity, though Uable to an objection with respect to the 

 first column. 



It appears absurd that the word Linnean names, should 

 be continued to shells wholly unknown to Linneus ; yet as 

 the arrangement is Linnean, the head could not well be dis- 

 pensed with, without injury to the body. 



It will be seen by a reference to the third column, that 

 the majority of the shells have been figured from specimens 

 in the British Museum, and the names attached to them 

 in that collection have been adopted. For the rest, except 

 such as have been derived from books, the Author gratefully 

 acknowledges the assistance of Mrs. Mawe, and Mr. Gray, 

 from whose Cabinets, and principally from the former he has 

 derived the most essential benefit. 



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