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It is recommended to the young student in Con- 

 chology, to compare carefully the following Spe- 

 cific Descriptions with the Plates to which they 

 refer, at the same time turning to the Nomencla- 

 ture for the exact signification of the terms. By 

 repeating this exercise till the species adopted as 

 examples of the different genera and sections be 

 perfectly known, a solid foundation will be laid for 

 a more extensive acquaintance with the numerous 

 beautiful and interesting individuals which are all 

 to be arranged under some one or other of these 

 generic forms. Those who may wish to acquire 

 an accurate knowledge of the Linnsean system with 

 still greater certainty, will find much benefit in 

 selecting for examination a good specimen of each 

 shell here illustrated, and placing them in a cabinet 

 in their proper order. A regular series upon this 

 plan, consisting of more or less valuable shells, with 

 references to the annexed drawings, may be pro- 

 cured from Mrs. Mawe, 149, Strand, in whose 

 superb collection almost every instructive subject 

 may be viewed, and from whose liberality and 

 science much information will be derived. 



