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BOOKS EECEIVED. 



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DOUBLE EEEEACTING SPAE.— Mr. Tennant, Geologist, 149 Strand, 

 has just received from Iceland some unusually large and fine specimens of this 

 interesting mineral. Mr. Tennant arranges Elementary Collections of Shells, 

 Minerals, Rocks, and Fossils, to illustrate Conchology, Mineralogy, and Geology. He 

 also gives Practical Instruction in Geology and Mineralogy. 



"ORITISH EOSSILS.— A Catalogue of British Fossils, by John Morris, 

 J-* F.G.S., comprising the Genera and Species hitherto described, with references to 

 their Geological distribution and to the localities in which they have been found. 

 This work forms a Complete Index to the publications of the Palseontographical Society, 

 CTCological Society, and other valuable works. Second Edition, price 12s. London : 

 J. Tennant, 149 Strand ; Taylor and Francis, Red Lion Court, Fleet Street. Copies 

 in sheets for interleavijig price 10s., (post free,) to be had of J. Morris, Kensington. 



npO COLLECTORS OF SHELLS. A Monograph of the CONES, by 

 SowERBT. Descriptions and coloured figures of all the species, price £2 10s. 

 TIus monograph also constitutes the 17th and 18th parts of Thesaurus conchyliorum, 

 each part. Sowerby, 9 Pembroke Square, Kensington. Van Voorst, Pater- 

 noster Row. 1 fe 



