lO PEOCEEDINGS OF THE 



The following papers were read : — 



1. "A further Contribution to the Freshwater Algae of the 

 West Indies." By Messrs. W. West, F.L.S., and G. S. West, 

 A.KC.S. _^ ^ , 



2. " On so-called ' Quiutocubitalism ' lu the Wing of Birds. 

 By P. Chalmers Mitchell, F.L.S. 



3. " Some facts concerning the so-called ' Aquintocubilalism 

 in the Bird's Wing." By W. P. Pycraft, A.L.S. 



April 6th, 1899. 



Dr. Albert C. L. Gt. GtiNTHEn, F.E.S., President, in the Chair. 



The Minutes of the last Meeting were read and confirmed. 



Messrs. William Bruce Bannerman, Charles Crossland, and 

 Arthur John Maslen were admitted; and Messrs. William 

 Harris, Lester Vallis Les-ter, and Eobert Brooks Popham were 

 elected Fellows of the Suciety. 



In view of the approaching Anniversary Meeting, Mr. Horace 

 W. Monckton and Dr. D. H. Scott were elected Auditors on 

 behalf of the Council, and Mr. Herbert Druce and Prof. J. Eey- 

 nolds Grreen on the part of the Fellows. 



Dr. 0. Stapf, A.L.S., exhibited specimens oi Stapfia cylindrical 

 Chodat, a freshwater alga discovered by him in a small pond 

 near Hallstadt, Upper Austria, and described by Prof. Chodat of 

 Geneva as a new genus of Tetrasporece. 



Although not unlike certain species of Tetraspora in outward 

 appearance, it differs from them in the perfectly solid gelatinous 

 structure of the thallus. The cells, which exhibit the essential 

 characters of the cells of PahnellecB, are arranged 1-3 deep in an 

 almost superficial layer on the surface of the colourless matrix ; 

 they eacb possess 2 sheathed cilia, which penetrate the matrix 

 and extend into the surrounding medium. The only modes of 

 reproduction so far known are by two subsequent divisions, 

 rarely by simultaneous division, into four daughter-cells, the 

 grouping of which into tetrads is, however, soon more or less 

 obliterated, and by the formation of hibernating resting-spores. 

 Prof. Chodat suggested that Stapfia cylindrica might be identical 

 with Tetraspora cylindrica, Kiitz., which in that case would have 

 to be quoted as a synonym ; but Dr. Stapf gave reasons for not 

 sharing this view. On this point he was supported by Mr. Gr. 

 Murray, F.E.S., F.L.S., who made some additional remarks. 



The following papers were read : — 



1. " On Car ex Wahlenberyiana." By Charles Baron Clarke, 

 M.A., F.K.S., F.L.S. 



2. " On the Discovery and Development of Ehabdites in Cepha- 

 lodiscus." By Mr. F. J. Cole. (Communicated by Prof. (i. B. 

 Howes, Sec. L. Sue.) 



