branch of Conchology, and bj dredging operations 

 conducted on various parts of tbe English, Irish, and 

 Scotch coasts, he is enabled to supply collections 

 named in accordance with the British '* Mollusca " 

 of Forbes and Hanley, or that of the British Con- 

 chology, by John C. Jeffreys, Esq , F.R.S , at the 

 following prices, containing on an average 3 of each 

 kind (choice specimens) : — 



100 species, £2 12s. 6d.*— 200 species, £6 6s.*— 300 

 species, £ 12 12s. — 400 species, £25. 



Elementary set of 100 species' (2 of each), 21s. 

 A priced Catalogue for single specimens, price 4d. 



FOSSILS. 



The extensive character of his stock of Eossils 

 enables B. D. to furnish large and comprehensive 

 collections, as indicated by the following selection. 

 The names, geological position, and localities of each 

 specimen are carefully given. 



Collections are prepared for those entering on the 

 study of geology, and also to illustrate recent works on 

 the science, at the following prices : 



Fossils and their rocks. 100 different specimens, £2 ; 200 

 ditto, £5 ; 500 ditto, £20 ; 1000 ditto, £50. 



POST TERTIARY. 



Sets of Shells from modern deposits in the raised 

 Sea Coast of Sweden. 



20 species (50 examples) 20s., including a report on the 



* Sets of these have been supplied, and are exhibited at the South 

 Kensington Mueum. 



