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GEOLOGY. 



Pfksons wishing to become acquainted witli thds iiiterestiiig branch of Science 

 will find their studies greatly facDitated by means of eleru.utary collections, which 

 can be had at Two, five, Ten, Twenty, or Mfty Guineas each. 



Arranged by J. Tennant, Geologist, 149, Sinmd, London. 



A Collection for Five Guineas, v^hich will illustrate the recent works on Geologv, 

 coutains 200 specimens, in a MaJiogany Cabinet, with five trays : \dz. 



MiNEKALS which are either the components of Rocks, or occasionally embedded in 

 them :— ftiiartz, Agate, Chalcedony, Ja^^pen Garnet, Zeolite, Hornblende, Augite, 

 Asbestus, Felspar, Mica, Tde, Tourmaline, Calcareous Spar, Fluor, Seleaite^ Barvta, 

 Strontia, Salt, Sulphur^ Plumbago, Bitumen, &c., &c. 



Native Metals, or METALLiFEnous Minerals; these are found in masses or 



beds, in veins, and occasionally in the beds of rivers. Specimens of the following 

 Metallic Ores are put in the Cabinet:— Iron, Manganese, Lead, Tin, Zinc, Copper, 

 Antimony, Silver, Gold, Platina, ^c. 



EocKS ; Granite, Gneiss, Mica-slate3 Clay-slate, Porphyry, Serpentine, Sandstones, 

 Limestones, Basalt, Lavas, &c. 



Silurian Fossils from the Llandeilo, Wenlock, and Ludlow Rockse 



Secondary Fossils from the Devonian, Carboniferous, Lias, Oolite, Wealdcn, and 

 Cretaceous Groups. 



Tertiary Fossils from the Plastic-clay, London-clay, Crag, &c. 



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JUST PUBLISHED. 



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A Stratigraphical List of British Fossils i arranged under the principal divisions 

 of the British strata, with a few elementary remarks on their character and localities, 

 by J. Tennant, F.G.S., price 2^, Sd. Can be sent by post for sixpence extra. 



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CONCHOLOGY. 



J. Tennant, having purchased the late Mrs. Mawe's extensive Collection of recent 

 Shells, begs to inform Collectors that the specimens are all re-marked, and consider- 

 ably reduced in price. 



Collections shewing the Genera, from Two to Twenty Guineas and upwards, 

 according to the number and qaality of the Specimens, 



The following Works on Conchology, ■published by the late Mr. Mmve, will h 



found useful to beginners ; they are all reduced in price, 



AVoDARCii's introduction to the Study or Conchology, 4th edition, describing 

 the Character of the Orders, Genera, and Species of Shells, according to the Lin- 

 necau An-angemcnt ; with an extensive Catalogue of Names under each Genus, to 

 which is added the best mode of Collecting, Cleaning, and Preserving Shells. Seven 

 plates, 6<y. plain ; or 10«y. coloxu'ed. Elegantly bound, 13,5. ^d. 



An Epitome of Lamarck's Arrangement of Testacea^ with Illustrative 

 Observations. Bv C. Du Bois., F.L.S. Price 10^. 



An Illustrated Introduction to Lamarck's CoNciioLoaY; being a literal 



Translation of the Descriptions of the recent and Fossil Genera, accompanied by 

 twenty-tvv'o highly -finished Lithographic Plates. By E, A. Crouch, F.L.S. Price, 

 coloured, 2/. Plain, 20,?. 



Mawe's Shell Collector's Pilot, or Voyager's Companion, with a coloured 

 Frontispiece and Plates of Insects. This Work is particularly adapted for voyagers 

 in general, pointing out the places where the best shells were obtained during a 

 voyage of discovery round the world ; also the best methods of preserving Insects, 

 Birds, &c. 4th edition, 3^. 



An extensive assortment of Minerals, Shells, and Fossils, together with all the 

 recent Works relating to Minf.ralogy, Geology, Conchology, and Chemistry, 

 Geological Maps, Hammers, Blowpipes, and Acid Bottles &c., can be supplied by 



JAMES TENNANT, Mineralogist to Her Majesty, 149, Strand, Loadon. 



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