69 



BIBLIOGRAPHICAL NOTICES. 

 Poissons cVEau douce d' Europe. Par Louis Agassiz, M.D. 



This work is now far advanced, and the publication will be com- 

 menced immediately. It will be completed in six livraisons of thirty 

 plates each, giving in the whole work one hundred and eighty for 

 the illustration of species and varieties. The first livraison will be 

 devoted to the Salmonidce, and will contain the species of Salmon, 

 Thy mains, and Coregonus which are at present known to exist in the 

 European waters, accompanied with the requisite details. 



Das System der Pilze, Durch Beschreibungen und Abbildungen er- 

 litutert, von Dr. Th. Friedr. Ludw. Nees von Esenbeck und A. 

 Henry. 8vo. Bonn, 1837. Erste Abtheilung. 12 Tab. 



Much expectation was raised by the announcement of the present 

 work in consequence of the great merit and originality of the Genera 

 Plantarum Flora? Ger mania published under the same auspices, 

 and especially because of the well-known System der Pilze und 

 Schwcimme of the author's brother. This expectation however has 

 been by no means answered, the figures being with very few excep- 

 tions mere copies and illustrations which have been repeatedly before 

 the public, and frequently not the best which might be selected. 

 The genera are often too vague and adopted on slight and insuffi- 

 cient grounds. We think moreover that affinities enunciated by the 

 great Swedish Mycologist have sometimes been rejected with evi- 

 dent loss to systematic harmony. Indeed it is to be regretted that 

 many hints thrown out by Fries, such as the identity of Namaspora 

 and Libertella, a fact to the truth of which we can ourselves bear 

 testimony, have been neglected. Though, however, but little addi- 

 tion is made to our knowledge of the structure or affinities of Fungi 

 in the present publication, as a compendium of genera and store- 

 house of illustrations it will be of great use to students who have no 

 ready access to the works to which the authors have had recourse. 

 The price is very moderate. 



Plantes Cryptogames de France. Par LB. H. I. Desmazieres. 



Fasc. XVII. Lille, 1836. 

 This admirable publication, resembling in its nature that of Bulliard 

 upon the Cryptogamic plants of the Vosges ?v!ountains, is the con- 

 tinuation of one well known to all Cryptogamists, Plantes Crypto- 

 games du Nord de France. The new title of the work indeed is a 

 consequence of the great importance to which the more partial one 



