I3IPORTANT WORKS ON NATURAL HISTORY. 



In the course of Publicailon, 

 I. 



ILLUSTRATIONS OF THE FOSSIL CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



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



1. Each Number will contain Four Coloured Plates, cnnraveil on Steel by tlie first Artists, with Four Pajjes of 

 Descriptive Letter-press; together wiili the Localities in which they occur, &c. price Three Shillings Coloured, or 

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



•2. The Work will extend to Twenty-five Numl)ers, containing in all One Hundred Plates. The Species will 

 be systematically arranged, agreeably to the classification of Lamarck, with the recently fornn.d CJenera of Deshayes, 

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



3. At the end of the M'ork will appear a Stratigraphical Index, on an entirely new plan, exhibiting at one view 

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



11. 



ILLUSTRATIONS OF THE CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



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



SECOND EDITION, WITH AUDITIONS. 



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

 will appear regularly every month. 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 engraved by Mn W. II. Lizaus, so that the Work 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- 

 logj- in which the Am.mals have been introduced, and is sold at a price not a third of others which do not contain a 

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



III. 



In the Press, and Speedily "mill Appear, 



THE ELEMENTS 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 the various Geological periods. By Captain TnOiMAS 

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



IV. 

 THE AMERICAN ORNITHOLOGY 



Of ALEXANDER WILSON, and CHARLE.S LUCIAN BONAPARTE, Prince of Mi.signano, 

 with the addition of all the newly discovered Species, sjstetnaticully Arranged ; and a Life of the 

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



\. This Work will appear in Monthly Numbers, each containing Six Coloured Plates, of n royal 4to. size, 

 accompanied by Twelve Pages of Letter-press. Price Three .Shillings and Sixpence. 



'2. The \Vork will extend to Thirty-one Numbers, and will form, when complete, two handsome royal 4to. 

 volumes, wilh One Hundred and Eighty-six Plates. The whole of the Liuid Birds the dimensions of a pigeon and 

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

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

 the Water Birds have been considerably enlarged. 



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

 celebrated artists. 



4. This Work, when completed, will not have cost the subscribers, even with the addition of upwards of Onf. 

 Hundred and FiKrv Biiins. more than an eighth part of the original American edition, now out of print, which 

 %vas publislied ul a sum exceeding £40, and is in the hands of very lew individuals in Great Britain. 



