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 NEW PUBLICATIONS. 



1. Sketch of the Geology of North America. By Charles Daubeny, M.D., 

 F.R.S., Professor of Botany and Chemistry in the University of Ox- 

 ford. 



This sketch, the perusal of which has afforded us both instruction 

 and pleasure, we recommend to the attention of geologists. 



2. Supplement to the Introduction to the Atomic Theory j comprehending a 

 sketch of certain opinions and discoveries bearing upon the General Prin- 

 ciples of Chemical Philosophy, which have been brought into notice since 

 the publication of that work. By C. Daubeny, M.D., Professor of Che- 

 mistry and Botany. 8vo, pp. 62. Oxford. Murray, London, and 

 Parker, Oxford. 1840. 



Dr Daubeny's " Supplement to the Introduction to the Atomic 

 Theory," like that work itself, noticed in a former volume of our 

 journal, will particularly interest those who cultivate this important 

 branch of Chemical Philosophy. 



3. A Manual of the Land and Fresh-Water Shells of the British Islands, 

 with Figures of each of the kinds. By Wm. Turton, M.D. A new 

 edition, revised and enlarged by J. G. Gray, F.R.S. London, Long- 

 man & Co. Bvo, pp. 310. 



Mr Gray has made nearly a new work of this by his numerous ad- 

 ditions and corrections. It is the best guide for this department of 

 the British Fauna. 



4. The Genera of Birds ^ with an Indication of the Typical Species of each 

 Genus. By G. R. Gray, Ornithological Assistant British Museum. 

 London, R. & J. G. Taylor. Bvo, pp. 80. 



This little volume will aid the young ornithologist and collector in 

 threading their way through the never-ending mazes of Ornithologi- 

 cal systems of arrangement. 



5. An Introduction to the Modern Classification of Insects, founded on the 

 Natural Habits, and corresponding Organisation of the different Families. 

 By J. O. Westwood, F.L.S. &c. &c. London, Longman & Company. 

 2 vols. Bvo. 



Mr Westwood's valuable, important, and learned work, by this time 

 in the Hbrary of every lover of entomology, commences with interest- 

 ing general observations on insects, and then proceeds to divide them 

 into ordei'S ; each order is then taken up separately, and divided into 

 families. The characters, habits, transformations, andfgeneral dis- 

 tribution of the insects comprised in each family are given with great 

 accuracy, and in a very interesting manner ; as are also the charac> 



