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 

 sale. 



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

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

 pi. 19, contains Ancillaria and other genera. A Hberal discount on personal 

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



ISLE OF WIGHT FOSSILS. 



H KEEPING can furnish 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 application. 



The specimens are aU collected by himself, and are kept careftdly separate. 

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

 he has been employed during many years. 



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



Stroud Place, Feeshwater, Isle of Wight. 



FOSSILS AND MINERALS. 



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

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

 very reasonable prices. 



Collections of Minerals in French-poKshed mahogany cabinets containing — 

 4 drawers . . . 120 specimens . . .£330 

 6 do. . . .200 do. . . . 5 5 0 

 8 larger do. . .400 do. . . . 12 12 0 

 These specimens are aU of the most select description, and characteristic of each 

 species ; they are arranged according to Dana's system of Mineralogy, and illus- 

 trate aU the recent works on the science. 



These collections can be arranged entirely with British Minerals if preferred, 

 otherwise they consist of specimens from all parts of the globe. 



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 aU the varieties of precious stones, in collections, etc. 



The Fossils include a very fine collection of Scottish Old Red Sandstone fishes, 

 together with numbers from other formations, especially fishes. These can be 

 had in coUeotions, or as single specimens. Several important specimens may be 

 mentioned, viz., Cyclopteris Hihernica, several of them in a state of fructification, 

 from the Devonian of Ireland ; very fine specimens of PtericMJiys, from Gamrie j 

 Holoptycliii, from Dura Den, etc. Some of these are well adapted for musems. 



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

 aU kinds of apparatus necessary for the coUection and arrangement of 'Geological 

 and Miner alogical specimens. 



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

 coUections of fragments of minerals can be had on application to 



J. R. GREGORY, 

 MINERALOGIST. 



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



