This day is published, 8vo., 3s. 6d., sewed, 

 ^VRE GHOITND BENEATH US: its Geological Phases and Changes. 

 J- Being three lectures on the theology of Claphira and the neighbourhood of 

 London generally . By Joseph Prestwich, F.R.S., F.G.S., &c. John Van Voorst, 

 1 J aternoster Row. 



This day is published, with numerous figures, 8vo., 15s., A 



MAJOJAL of the MINERALOGY of GREAT BRITAIN k IRELAND. 

 By R. PiiiLiPO Greg, F.G.S., and W. G. Lettsom. John Van Voorst, 1 Pater- 

 noster Row. 



FOSSIL FISH from the Old Red Sandstone for sale. Fine Museum 

 and Cabinet Specimens of Osteolepis, Glyptolepis, Dipterus, Coccosteus, &c. 

 Five select specimens of the beautiful little fish the " Osteolepis Microlepidotus " sent 

 on receipt of Post-office Order for 10s. 6d., to James R. Gregory, 59 Frith Street, 

 Soho, London, W. Please state whether for Cabinet or Museum. Also, some fine 

 specimens of Minerals, Precious Stones, &c., comprising Coloured Diamonds, Metoric 

 Irons, Native Gold from various localities, fine Silvers from Mexico, Emeralds, and 

 many fine and rare substances. 



Hugh Miller's "Old Red Sandstone. " describing the above fossils, forwarded post 

 free on receipt of 7s. 6d., the published price. Also, his other works, and all scientific 

 works, British and Foreign, forwarded in the same manner, post free. 



rj^O COLLECTORS OF SHELLS. A Monograph of the CONES, by 

 J- SowERBY. Descriptions and coloured figures of all the species, price £2 10s. 

 This monograph also constitutes the 17th and 18th parts of Thesaurus conchyliorura, 

 25s. each part. Sowerby, 9 Pembroke Square, Kensington. Van Voorst, Pater- 

 noster Row. 



EXCHANGE OF FOSSILS.— A Gentleman will exchange Fossils 

 from the Inferior Oolite for named Specimens from any other Formation. A ddress 

 S. S. H., Post-office, Clifton. Some of the answers to this advertisement in the Feb- 

 ruary number of the " Geologist " have not been received by the Advertiser. To 

 those gentlemen who have had their letters returned the Advertiser owes an apology, 

 and if they will take the trouble to re-post them, the accident will be explained. 



Just published, 



THE EARTH k THE WORD GEOLOGY, FOR BIBLE STUDENTS. 

 By S. R. Pattison, F.G.S. With a map, 3s. 6d. Longman & Co. 



REYNOLDS' OUTLINES OF SCIENCE AND ART. 

 Just published, price One Shilling, 



OUTLINES OFGEOLOG Y.— By T. Allison Readwin, F.G.S. 

 Containing an Outline of the Science, and a Revised Table of the Order of 

 Superposition of British Rocks, with their characteristic Minerals and Fossils, in 

 accordance with the arrangement at the Museum of Practical Geology, Jerrayn-st. 



"This pamphlet, though a mere outline of geolosry, contains some tables useful for the clear compre- 

 hension of the subject, and one of which (Table No. 3) is remarkably full of geological information re- 

 specting the fossils, minerals, rocks, and strata of Great Britain. The classification herein adopted is very 

 correct, and perhaps is not surpassed, if equalled, in this respect, by anv treatise or text-book hitherto 

 publislied. References to the cases of fossils in the Jermyn-street Museum accompany this table, so as to 

 render it a useful handbook for the visitor to that institution."— Gazette, Jan. 30, 1858. 



TABULAR VIEW OF THE ARRANGEMENT OF BRITISH 

 ROCKS. By T. Alltson Readwin, F.G.S. 

 Showing the order of Superposition of British Rocks, Minerals, and Fossils,, with 

 references to the Cases in the Museum of Practical Geology, .Jermyn-street. 



Price Sixpence, plain ; Ninepence, coloured. 



THE SAME PRINTED ON A LARGE SHEET, FOR LITERARY 

 INSTITUTIONS AND SCHOOLS. 

 Price Is. plain ; Is. 6d. coloured ; coloured and mounted on cloth, varnished, with 



roller, 2s. 6d. 

 London : Reynolds and Co., 15 Old Broad-street. 



