ADVERTISEMENTS. 



5 



NATURAL HISTORY AGENCY OFFICES. 



MR. G. B. SOWERBY has removed the above from the Strand to his private 

 residence (at Mr. Weiss), 32, GREAT RUSSELL-STREET, BLOOMS- 

 BURY. G. B. S. sells on commission, prepares for auction, conducts exchanges 

 of shells, minerals, fossils, books, names and arranges collections of shells, &c. 

 He has at present on hand some very fine reserves from collections of shells for 



The ILLUSTRATED INDEX OF BRITISH SHELLS, coloured, at 30s., 

 contains figures of all the recognized species. The Thesaurus conchyhorum, 

 pi. 19, contains AxLciUaria and other genera. A hberal discount on personal 

 apphcation to No. 32, GREAT RUSSELL-STREET, BLOOMSBURY. 



ISLE OF WIGHT FOSSILS. 



H KEEPING can famish smaU or large Collections of FOSSILS from the 

 • Hempstead, Bembridge, and Headon Series, and Barton Clay of the Isle 

 of Wight, Bracklesham Sands of Bramshaw, and Barton Clay of Barton, at Id. 

 and upwards per specimen, hsts of which can be sent on apphcation. 



The specimens are all collected by himself, and are kept carefully separate. 

 Satisfactory references can be given to several well-known Geologists by whom 

 he has been employed duxiag many years. 



H. K. also acts as a guide to the different geological localities. 



Stroud Place, Freshwater, Isle of Wight. 



FOSSILS, MINERALS, AND ROCKS. 



JAMES R. GREGORY has for Sale large Collections of the above, as single 

 specimens, or in collections, or as series from the various formations, etc., at 

 very reasonable prices. 



British rocks in collections of 100 to 200 specimens from various parts of the 

 British isles, stratigraphically arranged from aU formations, with name and 

 locahty. These are aU clean and fresh-broken specimens, aU of the same size in 

 each collection, so as to be arranged neatly and without waste of room in 

 cabinets, &c. 



Fragments of minerals for analysis by blowpipe, etc., in collections of 300 spe- 

 cimens in boxes, price 18s., or in single series of 50 at 3s., also 40 larger fragments 

 of rare or new minerals, 10s. 



Rare minerals and earths for chemical purposes, manufactures, etc. ; crystals of 

 diamonds, and all the varieties of precious stones, ia collections, etc. 



The fossils consist of a large and fine collection, all the British strata from the 

 Pleistocene to Cambrian, including fine specimens of fishes from the Devonian, 

 Lias, Carboniferous, and Oohtic series. Also fine museum specimens of Cyclop- 

 teris Hibemica, Holoptychius, Coccosteus, Turtles, and various other interesting 

 fossils, which may be obtained in collections, or as single specimens. 



Small or large collections can be arranged to order, for which estimates can be 

 torwarded. 



Scientifio Books, Maps, Charts, Cabinets, Glass-capped Boxes, Hammers, and 

 all kinds of apparatus necessary for the collection and arrangement of Geological 

 and Miaeralogical specimens. 



Lists of species of the Devonian fishes with prices, and lists of the contents of 

 collections of fragments of minerals can be had on apphcation to 



J. R. GREGORY, 



MINERALOGIST. 



3, KING WILLIAM-STREET, STRAND, LONDON, W.C. 



