ADVERTISEMENTS. 



5 



NATURAL HISTORY AGENCY OFFICES. 



MR. G. B. SOWERBY has removed the above from the Strand 

 to his private residence (at ]\Ir. Weiss), 32, GREAT RUSSELL-STREET, 

 BLOOMSBURY. G. B. S. sells on commission, prejoares for auction, conducts 

 exchanges of shells, minerals, fossils, books, names and arranges collections of 

 shells, &c. He has at present on hand some veiy fine reserves from collections of 

 shells for sale. 



The ILLUSTRATED INDEX OF BRITISH SHELLS, coloured, at 305., 

 contains figures of all the recognised species. The Thesauras conchylionim, pi. 19, 

 contains Ancillaria and other genera. A liberal discount on personal application 

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



ISLE OF WIGHT FOSSILS. 



TJ KEEPING can furnish small or large Collections of FOSSILS 

 from the Hempstead, Bembridge, and Headou Series, and Barton Clay of the 

 Isle of Wight, Bracklesham Sands of Bramshaw, and Barton Clay of Barton, at \d. 

 and upwards per sjiecimen, lists of which can be sent on application. 



The specimens ai-e 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 during many years. 



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



Stroud Place, Freshwater, Isle of Wight. 



FOSSILS AND MINERALS. 



TAMES 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. 



Collections of Minerals in French-polished mahogany cabinets containing — 

 4 drawers . . . 1 20 specimens . . .£330 

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



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

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

 sjiecies; they are aiTanged according to Dana's system of Mineralogy, and illustrate 

 iill the recent works on the science. 



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

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



Era;!:nients of minerals for analysis by blowpipe, etc., in collections of 300 speci- 

 mens ill boxes, price 18.?., or in single series of 50 at 2>s., also 40 larger fragments of 

 rnrc or new minerals, lO.v. 



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

 diamonds, and all the varieties of ])recious 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 

 collections, or sts single specimens: several important specimens may be mentioned, 

 viz. : Cyclopteris Hibernica, several of them in a state of fructification, from the 

 Devonian of Ireland; very fine specimens of Pterichthys, from Gamrie; Holoptychii, 

 from Dura Den, €tc. Some of these are well adapted for museums. 



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

 kinds of apparatus necessary for the collection and aiTangement of Geological and 

 Mineralogical specimens. 



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

 collections of fragments of minerals can be had on apj)lication to 



J. R. GREGORY, 



MINERALOGIST, 



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



