I3IPORTANT WORKS ON NATURAL HISTORY. 



In the course of Public at ion, 

 I. 



ILLUSTRATIONS OF THE FOSSIL CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



BY CAPTAIN THOMAS BUOWN, F.L.S., S:c. 



1. Each Xiiniher will contain Four Coloured Plates, cnnraved on Steel by the first Artists, with Four Pages of 

 Descriptive Letter-press; together with the Localities in which they occin-, &c. price Tlnee Shillings Coloured, or 

 Two Shillings Plain. A Fasciculus will ap))ear regularly on the first day of every month. 



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

 be svstematicall} arranged, agreeably to the classification of" Lamarck, with the recently formed Cienera of Dcshayes, 

 Sowerhv, Parkinson, Jfcc. introiluced into their respective places. Every Number will comprise at least I'oMy Shells. 



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

 the 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., Sec. 

 SECOND EDITION, WITH ADDITIONS. 



L Each Number will contain Four Coloured Plates, with complete Descriptions, Localities, ?cc. A Fasciculus 

 will appear regularly every month. Price Two Shillings and Sixpence Colouied, or One Shilling and Sixpence 

 Plain. 



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

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

 Land, and Fresh Water ; together with Illustrations of the Animals of nearly the whole CJenera. The Plates are all 

 already engravetl by Mr W. H. Lizaks, so that the Work will appear witii the utmost regularity. 



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

 logy in which the Am.mals have been introduced, and is sold at a jirice 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 xcill 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 TiioiMas 

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



IV. 

 THE AMERICAN ORNITHOLOGY 



Of ALEXANDER WILSON, and CHARLES LUCIAN BONAPARTE, Princo of Mnsirrnano, 

 with llie addition of all tlic newly distovorcd Species, systematically Arranged ; and a Life of the 

 Author. Hy Captain Thomas Biiown, F.L.S., &c. 



]. Tiiis Work will ajipear in Monthly Numbers, eacii containing Six Coloured Plates, of a royal 4to. size, 

 accompanied by Twelve Pages of Letter-press. Price Three .'^hillings and Sixpence. 



'2. Tile \V()rk will extend to Thirty-one Numbers, and will form, when complete, two handsome royal 4to. 

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

 under are tlie size of nature, and exhibit both male and female where a tlifference exists in the plumage ol tlic sexes, 

 and in some casc-s the young, luid are all at least .the sizes of tliose of the justly celebrated original work; and many of 

 tlie Water Birds have l)een considerably enlarged. 



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

 celebrateil artists. 



4. Tills Work, when completed, will not have cost the subscribers, even with the ad<lition of upwards of One 

 HuNDRKn Asn Fifty Birds, more than an eiglith part of the original American edition, now out of print, which 

 was published at a sum exceeding £40, and is in the hands of vtrv few individuals in Great Britain. 



