88 west: additions to the alce of west Yorkshire. 



Class i.— CHLOROPHYLLOPHYCE.E. 

 Order i.-COCCOPHYCE/E. 

 Fam. \.—PALMELLACEj£. 

 *Pleurococcus angulosus Meneg. Penyghent; G. S. West. 

 *Chlorococcum humicolum Rabh. Baildon; W. and G. S. West. 

 *Chlorococcum gigas Grun. Adel Bog ; W. and G. S. West. 

 Glceocystis ampla Kiitz. Wigton Moor; near Keighley. Baildon; 

 W. & G. S. West. Penyghent ; G. S. West. 



GlCEOcystis vesiculosa Nag. Near Keighley ; Malham ; Wigton 



Moor. Baildon ; W. and G. S. West. 

 Glceocystis rupestris (Lyngb.) Rabh. Near Keighley; Wigton 

 Moor. 

 *Glceocystis botryoides Kiitz. Near Keighley. 

 *Schizochlamys gelatinosa A.Braun. Cullingworth. Abundant 



in a drain ditch, Nab Wood, Bingley. 

 *Palmella mucosa Kiitz. Keighley ; Doncaster ; Beamsley 



Beacon ; Goole. 

 *Palmodactylon subramosum Nag. Wigton Moor. This was 

 in nice condition and exactly agreed both as to form and 

 dimensions with the excellent figure of Kirchner in ' Die 

 Mikroskopische Pflanzenwelt des Siisswassers. 1885.' 

 Dictyosphaerium ehrenbergianum Nag. Baildon ; W. and 

 G. S. West. 



Fam. \\.—PROTOCOCCACEsE. 



Scenedesmus acutus Meyen. Hawksworth; W. and G.S. West. 

 Pediastrum boryanum Turp. Austwick ; Hawksworth ; Wigton. 



Fam. lll.— VOLVOCINEsE. 



Chlamydococcus pluvialis A. Braun. Manningham; W. and 

 G. S. West. This occurred in great quantity in the troughs of 

 mortar machines after very heavy rains. 



Pandorina morum Ehrenb. Rombald's Moor ; W. and 

 G. S. West. 

 *Stephanosphaera pluvialis Cohn. Baildon; W. and G. S. West. 



Order II.— ZYGOPHYCE/E. 

 Fam. l.—DESMIDL-E. 

 Gonatozygon ralfsii DeBary. Cullingworth ; Wigton Moor. 

 *Gonatozygon brebissonii DeBary. Cullingworth. Penyghent; 

 G. S. West. Adel Bog ; W. and G. S. West. 



Naturalist, 



