90 west: additions to the alce of west Yorkshire. 



Penium margaritaceum Breb. *Var. punctatum Ralfs. 



Wigton Moor ; Cullingworth. 

 Penium digitus Breb. Eldwick. Frizinghall ; G. S. West. 



Rombald's Moor ; W. and G. S. West. 

 Penium closterioides Ralfs. Cullingworth. 

 *Penium navicula Breb. Thornton Moor ; W. and G. S. West. 

 Penium brebissonii Ralfs. Wigton Moor ; Cullingworth ; 



Ingleborough ; near Keighley. Thornton Moor ; Adel Bog ; 



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

 *Penium truncatum Breb. Thornton Moor ; Adel Bog ; W. and 



G. S. West. Penyghent ; G. S. West. Cullingworth. 

 *Penium mooreanum Arch. Howgill Fells ; Kildwick. This 



Penium was not in zygospore, but the dimensions and form 



exactly coincided with that of the barren plant. 

 Cylindrocystis crassa DeBary. Ingleborough; near Keighley; 



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

 Tetmemorus brebissonii Ralfs. Cullingworth ; Ingleborough. 



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

 Tetmemorus granulatus Ralfs. Wigton Moor. Baildon; 



W. and G. S. West. 

 Tetmemorus laevis Ralfs. Thornton Moor, abundantly, among 



Dicranella squarrosa Schpr. ; W. and G. S. West. Near 



Hawksworth. 

 Micrasterias denticulata Breb. Wigton Moor. 

 Micrasterias papillifera Breb. Cullingworth. 

 Euastrum ampullaceum Ralfs. Wigton Moor. 

 Euastrum insigne Hass. Cullingworth ; Wigton Moor. 

 Euastrum didelta Ralfs. Ingleborough. 

 *Euastrum cuneatum Jenner. Ingleborough. 

 Euastrum ansatum Ehr. Wigton Moor. Adel Bog; W. and 



G. S. West. 

 *Euastrum circulare Hass. Cullingworth. Adel Bog ; W. and 



G. S. West. 

 *Euastrum sinuosum Lenor. Baildon. Penyghent ; G. S. West. 

 Euastrum pectinatum Breb. Wigton Moor. 

 Euastrum elegans Breb. Wigton Moor. 

 Euastrum binale Ralfs. 



*Var. elobatum Lund. Penyghent ; G. S. West. 



* Forma minor W. West in Journal of Bot. (Nov. 1888). 



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



Naturalist, 



