I^IPORTANT WORKS ON NATURAL HISTORY. 



In the course of Publication, 

 I. 



ILLUSTRATIONS OF THE FOSSIL CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



BY CAPTAIN THOMAS BROWN, F.L.S., &c. 



1. Knell Number will contain Four Coloured Plates, cngraveil on Steel by tlie first Artists, witli Four Pages of 

 Descriptive I,(tter-j)ress ; together witli tlie Localities in wliicli tliey occur, &c. price Three Shillings Coloured, or 

 Two Shillings Plain. A Fasciculus will appear regularly on the first day of every month. 



•2. Tile Work will extend to Twenty-five Numbers, containing in all One Hundred Plates. The Species will 

 be systematically arranged, agreeably to the classification of Lamarck, with the recently formed Genera of Deshayes, 

 Sowerby, Parkinson, &c. introduced into their respective jilaces. Fvery Number will comprise at least Forty Shells. 



3. At the end of the \\'ork will aj)pear a Stratigraphical Index, on an entirely new plan, exliibiting at one view 

 the whole British Species of Fossil Shells, with their Geological positions. 



II. 



ILLUSTRATIONS OF THE CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



BY CAPTAIN THOMAS BROWN, F.L.S., &c. 



SECOND EDITION, WITH ADDITIONS. 



1. Each Number will contain Four Coloured Plates, with complete Descriptions, Localities, &c. A Fasciculus 

 will appear regularly every niontli. Price Two Shillings and Sixpence Coloured, or One Shilling and Sixpence 

 Plain. 



2. The Work will extend to Fifteen Numbers, containing in all Fifty-eight Plates, with about Twelve Hundred 

 Figures of Shells, being Representations of ALL the Species discovered up to the present time, including Marine, 

 Land, and Fresh ^\'ater ; together with Illustrations of the Animals of nearly the whole Genera. The Plates are all 

 already enirraved by Mn W. II. Lizaus, so that the ^\'ork will appear with the utmost regularity. 



3. This is the only Work which contains Representations of ALL the Species, and is the only British Concho- 

 logy in which the Animals have been introduced, and is sold at a price not a third of others which do not contain a 

 lialf of the Species, while the Engravings are executed in a much higher style of art. 



III. 



In the Press, and Speedily will Appear, 



THE ELEINIENTS OF FOSSIL CONCHOLOGY, 



Illustrated by Figures, engraved on Steel, of ALL the known Genera; with their Generic Characters, and a 

 complete Description of their application to the elucidation of Uie various Geological periods. By Captain Tho.mas 

 BnowN, F.L..S., &c. Roval 18mo. 



IV. 

 THE AMERICAN ORNITHOLOGY 



Of ALEXANDER WILSON, and CHARLES LUCIAN BONAPARTE, Prince of iMiisii^rnano, 

 with the ;i(l(Iilion of all the newly discovered Sj)ecies, systeniatically Arranged ; and a Life of the 

 Author. Uy Cai'tain Thomas Buown, F.L.S., &c. 



L This Work will appear in Monthly Numbers, each containing Six Coloured Plates, of a royal Ito. size, 

 accompanied by 'I'welvc Pages of Letter-j)ress. Price Three Shillings and Sixpence. 



'i. The \\'<(rk will extend to 'I'liirty-one Numbers, and will form, wlitii r()iii])lete, two handsome royal -tto. 

 volumes, with One Hundred and Eighty-six Plates. The whole of the Land liirds the dimensions of a pigeon and 

 under arc the size of nature, and exhibit both male and female where a diflerence exists in the plumage of the sexes, 

 and in some cases the young, and are all at least the sizes of those of the justly celebrated original work ; and many of 

 the \\'ater Birds have been considerably enlarged. 



3. Nearly the whole Plates are already engraved, by Lizars, Scott, Mitchell, Miller, Milne, Harvey, and other 

 celebrated artists. 



4. This Work, when comj)lcted, will not have cost the subscrilars, even with the addition of upwards of One 

 HuNDiiKo AND I'm V BiiiDN. more than an eighth jiart of the original American edition, now out ol print, which 

 was published at a sum exceeding £-10, and is in the iiands of very few individuals in Great Britain. 



