CONTENTS OF VOL. XVIII. 



NUMBER CXVI. 



Page 



I. On the Circulation of the Sap in the Interior of Cells. By Hugo 

 Von Mohl 1 



II. List of the Birds observed to winter in Macedonia; from Notes 

 made by Capt. H. M. Drummond, 42nd R.H., during a two months' 

 Shooting Excursion in the Interior during the winter of 1845-46 ...... 10 



III. Observations on the Cell-Membrane of Plants. By G. H. K. 

 Thwaites 15 



IV. Descriptions of some apparently new species of Orthopterous 

 and Homopterous Insects. By Adam White, M.E.S., Assistant in the 

 Zoological Department of the British Museum. (With a Plate.) 23 



V. Remarks on certain Genera belonging to the Class Pallio- 

 branchiata. By William King, Curator of the Museum of the Na- 

 tural History Society of Northumberland, Durham and Newcastle- 

 upon-Tyne 26 



VI. On Ginnania furcellata. By Gius. de Notaris 42 



VII. Descriptions of four apparently new species of Longicorn 

 Beetles in the Collection of the British Museum. By Adam White, 

 M.E.S., Assistant in the Zoological Department of the British Museum. 

 (With a Plate.) 47 



VIII. Descriptions of the Mymaridts. Communicated by Francis 

 Walker, Esq., F.L.S 49 



Proceedings of the Zoological Society; Botanical Society of Edin- 

 burgh 54—67 



Description of a new family and genus of Lizards from Columbia, by 

 J. E. Gray, Esq., F.R.S. &c. ; On the detection of Spirally-dotted 

 or Scalariform Ducts, and other Vegetable Tissues in Anthracite 

 Coal, by Prof. J. W. Bailey, of the U. S. Military Academy ; Phy- 

 siological Remarks on the Statics of Fishes, by Joh. Miiller; Ci- 

 conia alba ; Embryogeny of the Onrithomyice , by M. Blanchard ; 

 Meteorological Observations and Table 67 — 72 



