Zoological Writings of Rajinesque. 287 



Journal of Science.* Of these we are acquainted with Exoglos- 

 sum alone, which is founded upon natural characters, and is a 

 good genus. 



Without knowing their precise date, we will here notice a se- 

 ries of articles from vols. 5, 6, and 7 of the An. Gen. des Sci. Phys., 

 published at Brussels. Ours is a detached set, and we may there- 

 fore have omitted other articles from the same work. 



Prodrome d'lme Monographie des Turbinolics du Keniuky, 

 par C. S. Rafinesque et J. D. Clifford. Five sub-genera and six- 

 teen species are described. 



Monographie des coquilles bivalves et Jiiiviatiles de la riviere 

 Ohio, (with figures. ) As Rafinesque was the first to make known 

 the greater part of the western Unios, it is but fair that those who 

 study this genus, should exert themselves to identify his species. 

 They are surrounded by fewer difficulties than those of Linnasus, 

 yet there is little doubt respecting the latter, and as Rafinesque 

 sold examples of his species to any one disposed to purchase, he 

 certainly must be credited with the disposition to afford every as- 

 sistance. The most complete collection of authentic specimens 

 now existing, is that of Mr. Poulsonf of Philadelphia, who also 

 possesses many of Rafinesque's unpublished MSS. and drawings.^ 

 Most of these species are, in fact, so well established, that it is a 

 mere affectation to assert that they cannot be identified. The 

 greater part of Mr. Swainson's sub-genera of American Unios in 

 the Cabinet Cyclopedia, were previously indicated by our author. 

 The same paper contains a division of the genus Cyclas into sub- 

 genera, but without any notice of Pisidium. 



Sur les animaiix polistomes et porostomes. The former are 

 Zoophytes, the latter Infusoria, which with the older authors, he 

 supposed to take their nourishment by means of pores, whence 

 the name. As an example of the style, we transcribe a few of 

 the introductory observations. " Des erreurs accreditees pas des 

 savans illustres, admises tacitement comme des verites demon- 

 trees par la foule des copistes et des esprits superficiels qui se con- 

 tentent de croire sur parole, sont bien difRciies a detruire ; neam- 



* Several reptiles are described here, also. 



t Oiir cabinet contains three shells not in Mr. Conrad's list, viz. Unio pallens, 

 metaplatos and bicolor ; the last is a variety of U. dilatatus, Raf. Mr. P. is so liber- 

 al that he gives every facility to those who wish to consult his fine collection and 

 library. 



+ We have a considerable number of these. 



