A MONOGRAPH 



OF THE 



BRITISH DESMIDIACE.E 



BY 



AY. AYEST, F.L.S., 



Ex-president of tin' Yorkshire Naturalists? Union; 



Lecture i- in. }:<>(, nnj, /.'I/'<M/. <nnl Bacteriology at the Techni*" 1 



College, Bradford ; 



AXD 



GL S. WEST, M.A., F.L.S., A.R.C.S., 



Professor of Xdti'ral History at trie Royal Agricultural College, Circncester ; 

 Formerly Scholar and Hutchinson Research Student of St. John's 



College, C'a nil ridge 



VOLUME I 



LONDON 

 FEINTED FOR THE RAY SOCIETY 



1904 



