182 



the largest of which envelope a radiating arrangement of anchor-like 

 spicula ; 4. Towards, and in the rind, elongated cellules, apparently 

 fibrous and muscular, the fibrous connecting the spicula, and with 

 the nucleated muscular cellules arranged transversely as figured by 

 Donati. 



7. From the structure of Tethea, as well as from the observations 

 of Donati and M. Edwards, this group of sponges would appear to 

 possess considerable contractility. 



The following Donations to the Library were announced : — 

 Journal of Agriculture, and Transactions of the Highland and 



Agricultural Society of Scotland. N.S. No. 40. 8vo. — From 



the Society. 

 Papers and Proceedings of the Royal Society of Van Diemen's 



Land. Vol. II., Part 1. 8vo. — From the Society. 

 The Canadian Journal ; a Repertory of Industry, Science and Art, 



and a Record of the Proceedings of the Canadian Institute. 



January 1853. 4to. — From the Institute. 

 Flora Batava. 172 Aflevering. 4to. — From the King of Holland. 

 Acta Regise Societatis Scientiarum Upsaliensis. 3d Series. Vol. I. 



Fascic. 1. 4to. — From the Society. 

 Berichte iiber die Verhandlungen der Kbniglich Sachsischen Gesell- 



schaft der Wissenschaften zu Leipzig. Mathematisch-Phy- 



sische Classe I. 8vo. — From the Society. 

 XJeber Musikalische Tonbestimmung und Temperatur. Von M. W. 



Drobisch. 8vo. — From the Author. 

 Beitrage zur Kenntnis der Gefass-kryptogamen. Von Wilhelm Hof- 



meister. 8vo. — From the Author. 

 Jahrbuch der Kaiserlich-Koniglichen Geologischen Reichsanstalt. 



1852. No. 2. 8vo. — From the Institute. 

 Memoirs of the American Academy of Arts and Sciences. N.S. 



Vol. IV., Part 2. 4to. — From the Academy. 



