ADVERTISEMENTS. 



5 



NATURAL HISTORY AGENCY OFFICES. 



MR. G. B. SOWERBY laas removed tlie above from tlie 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 OP BRITISH SHELLS, colonred, at 30s., 

 contains figures of all the recognized species. The Thesam'us conchyliorum, 

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

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



ISLE OF WIGHT FOSSILS. 



H KEEPING can furnish smaU or large CoUections 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 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 different geological localities. 



Stroud Place, Freshwater, Isle of Wight. 



FOSSILS, MINERALS, AND ROCKS. 



JAMES R. GREGORY has for Sale large CoUections 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 

 locality. These are all clean and fresh-broken specimens, all 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 aU the varieties of precious stones, in collections, etc. 



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

 Eocene to Cambrian, including five specimens of fishes from the Devonian, Lias, 

 Carboniferous, and Oohtic series. Also fine museum specimens of Cyclopteris 

 Hibernica, 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. 



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

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

 and Mineralogical 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 application to 



J. R. GREaORY, 

 MINERALOGIST. 



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



