ADVERTISEMENTS, 
7 
ATURAL HISTORY AGENCY OFFICES, for the registcriug, 
exhibition, purchase, sale, and exchange of Hooks, Collections, and Objects, con- 
ducted by a. B. SOWERBY, F.L.S. Also for the publication of SOWERBY'S 
ILLUSTRATED INDEX OF BRITISH SHELLS :— all the Species, SOs. ; THE- 
SAURUS CONCHYLIORUM, 25s. each part; BRITISH FLOWERING PLANTS, 
in numbers at 3s. 391, Strand, W.C. 
TO GEOLOGISTS. 
RED AND WHITE CHALK of Speeton and East Yorkshire. 
The characteristic and rarer Fossila of the above formations constantly on 
sale at Bridington. Address as under. 
Edwaud Tindall, Old Guildhall, Bridlington. 
ISLE OF WIGHT FOSSILS. 
H KEEPING can furnish small or large Collections of Fossils 
• from the Hempstead, Bembridge, and Headon Series, and Barton Clay of 
the Isle of Wight, Bi'acklesham Sands of Bramshaw, and Barton Clay of Barton, 
at Id. and upwards per specimen, lists 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 guide to the different geological localities. 
Stroud Place, Freshwater, Isle of Wight. 
n LASS-CAPPED CIRCULAR BOXES, of various diameters and 
VX depths for preserving and displajdng in Cabinets delicate Fossils, Minerals, 
Recent Shells, Eggs, &c., can now be purchased of 
JAMES GREGORY, 3, King William-street, Strand. 
JOHN GRAY, 13, Upper King-street, Holbom. 
GEORGE KNIGHT, 2, Foster-lane, Cheapside. 
ROBERT HENSON, 113a, Strand. 
CAROLINE SOWERBY, 61, Great Russell-street, Bloomsbury. 
JAMES TENNANT, 149, Strand. 
BRICE M. WRIGHT, 36, Great Russell-street, Bloomsbury. 
G. B. SOWERBY, 391, Strand. 
The application of these boxes to Natural History purposes may be seen in 
the Museiuns of Edinburgh, Newcastle, York, and LiverpooL 
A lithographed sheet, shewing sizes and prices, may be had by post. 
EDWARD CHARLESWORTH. 
British Natural History Society, 
York, August, 29, 1859. 
In the Press, price to Subscribers, 5s. 
rPHE CHALK CLIFFS OF DOVER ; A Geological and Palson- 
J. tological Description of the typical section of the English Upper Cretaceous beds. — By 
S. J. Mackie, F.G.S., F.S.A. 
Of the beautiful and instructive section of the Chalk Strata at Dover, there exists no other 
description than the original and admirable paper by William Phillips in the Geological Trans- 
actions of 1818. The author's long and intimate acquaintance with this locality gives him 
peculiar facilities for presenting in a light and readable form a concise and accurate account of 
the White Cliffs of this celebrated shore, and which he trusts will be thought worthy of being 
regarded as a text-book generally for the chalk-districts of England. 
The proposed work -wiU be illustrated by flrst-class woodcuts, and will be issued to Subscribers 
at the price of Five ShilHngs. Subscriptions will be received by the Author, 154, Strand. 
London : J. Van Voorst, Paternoster-row. 
ADDITIONAL SUBSCRIBERS' NAMES RECEIVED:— 
J. F. Crouch, Esq., Perabridge Rectory, Herefordshire. 
A few Copies tvill be Printed on Tinted Paper, and Bound in Superior Style, at IQs. 6d. 
