605 



merely to result from the spreading and shrinking of the 

 valves. Loxsoma appears to be the only recorded genus as 

 possessing that peculiarity of fructification. 



The specific descriptions of Trichomanes radicans and 

 its synonyma, are fully given in part 2, p. 1 25, of that invalu- 

 able work, Species Filicum, by Sir J. W. Hooker, recently 

 published. 



Professor Allman made some observations on Mr. An- 

 drews's paper, in corroboration of its principles. 



DONATIONS. 



Proceedings of the Geological Society of London. Vol. 

 IV., Part 1. (1843). Presented by the Society. 



Bulletin der Konigl. Akademie der Wissensc/i often zu 

 Munchen. Nos. 1 to 55. 



Abhandlungen der Philosophisch. Philologischen Classe 

 der Koniglich Bayerischen Akademie der WissenscJiaften 

 zu Munchen. Dritten Bandes dritte Abtheilung, in der Reihe 

 der Denkschriften der XVIII. Band. 



Abhandlungen der Mathematisch. Physikalischen Classe 

 der Koniglich Bayerischen Akademie der Wissenschaften 

 !su Munchen. Dritter Band. Die Abhandlungen von den 

 Yahren, 1837, bis 43, enthaltend. Presented by the Aca- 

 demy of Munich. 



Versuch einer objeetiven Begrilndung der Lehre von der 

 Zusammensetzung der Krdfte. Von Dr. Bernard Bolzano. 

 Presented by the Author. 



Prodromus zu einer neuen, verbesserten Darstellungsweise 

 der hohern analytischen Dynamik. Vom Grafen G. Von 

 Buquoy, Ph. D., &c. Presented by the Author. 



