G. B. SOAVERBY, June, 



Supplies single Specimens or large parcels of 



RECENT SHELLS AND FOSSILS 



Parcels will be sent for selection, to those who forward suitable credentials, in any 



part of the world, so that those Collectors whose supplies have been interrupted 



by a recent lamented death can now have them renewed. 



G. B. S , Junv., lias a very large stock of Shells, purchased from the 

 Vauterian and Dennissonian Collections, and from the stores of the late 

 M. Cuming, as well as from the sale of ]\Ir. Eeeve's stock, and other 

 sources. 



COLLECTIONS OF BRITISH SHELLS. 



Seventy-five named species, arranged in a box, having the appearance of 

 a book in two volumes. One Guinea. Or a more extensive series prepared 

 in the same manner. 



THE RECENTLY DESCRIBED FOSSILS FROM THE LINGULA FLAGS, SOUTH 

 WALES, SUPPLIED SINGLY OR IN SETS. 



BOOKS BY G. B. SOWERBY, F.L.S. 



(Discount to direct purchasers.) 



THESAURUS CONCHYLIORUM ; 



OR MONOGRAPHS OF RECENT SHELLS. 



Parts 24 and 25 will be published before Christmas, 1865, containing 

 additions to former Monographs, and some new Monographs ; 



Gomijleting Fol III. and the First Series. 

 The Xew Series, to be commenced early next year, will appear under 

 improved conditions, and will be carried to a completion in as small a 

 comjiass and as short a time as possible. 



ILLUSTRATED INDEX OF BRITISH SHELLS. 



Cloth gilt, Imperial. 

 700 coloured figures of 600 species, with names, localities, and other 



information. 



NEW PROPOSED WOEK, BY G. B. SOWEEBY, F.L.S 

 GENERIC FORMS OF SHELLS ILLUSTRATED. 



The Author has long been engaged collecting materials for this Work, 

 which is to contain a harmonization of existing systems, in which a 

 balance will be struck between a too negligent and too minute subdivision. 

 Comparative susceptibility of definition will be the guiding principle in 

 deciding the claims of certain groups to generic separation. The illustra- 

 tions will be copious and of full size, embracing every marked form, 

 whether recent or fossil, and whether adopted as a genus or not. The 

 price is not yet fixed, but is expected to be about £3 3s. To appear 

 between March and May, 1866. 



G. B. S , jun., will be glad to receive the names and addresse3 of those who desire 

 to see the Work when published. 



45, GREAT RUSSELL STREET, BLOOMSBURY. 



