LIST OF PLATES 



I. An Unusually Coloured Rata clavata, Linnaeus. 

 II. Pylaiella varia, Kjellman, and Ectocarpus Landsburgii, Harvey. 

 III. Ccuiuella perplexa, sp. nov., and Longipedia coronata, Claus. 

 IV. Scottish Desmidiese. Plate I. 



