40 PROCEEDINGS OF SOCIETIES. 



here of a very fitful and irregular character. It possibly 

 bears some relation to the movement of the free granules 

 at the ends of the frond. I have scarcely ever found any 

 difficulty in detecting it.] 

 Closterium lanceolatum (Kutz.), not common. 

 „ acerosum (Schrank), not uncommon. 



turgidum (E.), 

 „ Leibleinii (Kutz.), common. 

 ,, Dianae (Ehr.), „ 



„ didymotocum (Cor da), not uncommon. 

 ,, striolatum (E.), very common. 

 ,, attenuatum (12.), rare. 



juncidum( ), „ 



„ rostratum (Ehr.), „ 

 Spirotaenia condensata (Breb.), common. 

 Ankistrodesmus falcatus ( Cor da), very common. 

 Pediastrum tetras (Ehr.), not uncommon. 

 ,, heptactis (Ehr.), ,, 



„ Boryanum (Turp.) ,, [I have met (rarely) in two or 



three of the cells the contents receded from the walls, and 

 massed together into a single, globular, green body in the 

 centre, so as to leave the remainder of the otherwise 

 normally formed cell quite empty. This took place in the 

 outside row of, and not in neighbouring, cells. This body 

 is possibly a gonidium destined for the propagation of the 

 organism. I have seen somewhat similar bodies in the 

 cells of a species of Spirogyra, not the result of conjuga- 

 tion.] 

 ,, ellipticum (Ehr.), common. 



Scenedesmus quadricauda (Turp.), very common. 

 ,, obliquus (Turp.), not uncommon. 



„ obtusus (Meyen.), „ 



The Members then proceeded to ballot, when the following were 

 elected : — As Honorary Member, Captain M'Clintock, B.N. ; as Corre- 

 sponding Members, C. C. Babington, F.R.S., and Professor the Rev. J. S. 

 Henslow ; as Ordinary Members, John Barker, M.D., Stephen Gwynne, 

 A.B., and John Irvine Whitty, LL.D. ; and as Associate Members, Wil- 

 liam Archer and Vere Webb M'Nally. 



The President then left the Chair, and the meeting resolved itself 

 into a Conversazione. 



Professor Harvey exhibited various vegetable organisms and tissues 

 under the microscope, and many interesting species of microscopic algae. 

 Mr. Callwell and Mr. Yeates exhibited specimens of the Botifera and 

 other animalcules, as also the circulation of the cell-sap in plants. Dr. 

 Barton exhibited the circulation of the blood corpuscles in the web of a 

 frog's foot. Dr. Carte, various sections of coal from the Arctic regions, 

 brought home by Captains Sir B. M'Clure and M'Clintock. Mr. A. 



