Catalogue Raisonni. ^^jRi 



Manuel de I'Histoire Naturelle, S^x. Manual of the Natural 

 History of MoUusca and their Shells, &c. By Mb. Sander Rang. 

 8vo. Pp. 390. Eight Plates. Roret. Paris. 



This little manual is, of all general works on mollusca and their shells, the 

 best representative of the state of the science, and the result of successive 

 discoveries. 



Mr. Rang gives the tables of the methods of Mr. Cuvier in 1817, of de La- 

 marck in 1818, of de Ferussac in 1819, of de Blainville and Latreille in 

 1825. A table also presents a view of the classification followed in this 

 maniial, which is also tuw, olFering the modifications which Mr. Rang 

 proposes in Mr. de Ferussac's method. 



Mr. Rang gives with great care the characters of the classes, orders, and 

 genera, and has generally indicated the most remarkable species. 



Commentatio de Historia Natural] Animalium Molluscorum, 

 Regno-Belgico indigenorum. Auct. Henr. Guil. Waarden- 

 BURG. 4to. Pp. 59. Leyden. 



The author of this dissertation has given a short account of the anatomy, 

 physiology, and habits of the mollusca, principally derived from the 

 works of Cuvier. He has also enumerated the species of indigenous 

 mollusca of Belgium, the specific definitions, and the locaUties. He 

 has adopted the classification of Lamarck. Like all works of a local 

 character, this dissertation is useful in making us acquainted with the 

 mollusca of Holland and its shores. 



Essai monographimie, ^c. Monograph of the Hieracium and 

 some neighbouring Genera. By Auguste Monnier. Pp. 92. 

 8vo. Nancy, 1829. 



Hieracium is perhaps one of the most difficult genera for the determination 

 of species. The number of species has been beyond measure increased 

 by florists, who, in the least variation of form, have seen new plants, and 

 have given them new names. The generality of species of Hieracium 

 pass into one another in almost imperceptible transitions, and unless we 

 have made an attentive study of all the varieties, that is to say, unless 

 we have herborized a long time in the different mountainous countries 

 of Europe, where the diflferent stations singularly modify the character* 

 of the types, we shall always find a difficulty in distinguishing them. 



Mr. A. Monnier has, it appears, particularly devoted himself to the study 

 of the genus Hieracium, and the work which he now publishes, is the 

 fruit of several years laborious study, and of multiplied journies in the 

 Alps, Pyrenees, and Vosges ; but he does not appear to have been ac- 

 quainted with a recently published paper of Mr. I)on's, on the genera of 

 the family Chicoraceae. The sections are, however, well characterized, 

 and as our space will not allow us to analjrze the work, we recommend 

 it to the attention of botanists, as containing some novelties in re^l^- 

 tion to the genus Hieracium. 



