WEST: ADDITIONS TO THE ALGiE OF WEST YORKSHIRE. 95 



Hormiscia zonata W.&M. Cautley. Baildon; Eldwick; 

 W. and G. S. West. Penyghent ; G. S. West. Roundhay ; 

 W. B. Turner. 



Hormiscia aequalis (Kiitz.) Var. cataeniformis Kiitz. Near 



Mirfield. 

 Ulothrix variabilis Kiitz. Horton ; W. and G. S. West 

 *Ulothrix tenerrima Kiitz. Near Bradford. 

 Ulothrix radicans Kiitz. Fountain in front of Leeds Town 



Hall (in as well as out of the water) ; G. S. West. 



Fam. VUl. — CH^ETOPHORACE.E. 



Microthamnion vexator Cooke. Allerton; W. and G. S. West. 



Class II.— PHYCOCHROMOPHYCE.E. 



Order I.— CYSTIPHOR/E. 



Fam. l. — CHROOCOCCACE^E. 



Chroococcus turgidus Nag. Ingleborough; Wigton Moor; 

 Elslack. 



Glceocapsa caldariorum Rabh. Greenhouses at Horton. 

 *Aphanocapsa grevillei Rabh. Ingleborough; Howgill Fells; 



Cautley. Baildon; G. S. West. 

 ^Microcystis protogenita Rabh. Saltaire. 

 *Clathrocystis aeruginosa Henf. Frizinghall ; W. and G. S. West. 

 *Ccelosphaerium kutzingianum Nag. Ingleborough. 



Order II.— NEMATOGEN^E. 



Tribe \.—NOSTOCHIXEsE. 



Fam. l.—NOSTOCEsE. 



*NostOC piscinale Kiitz. Near Bradford. 



*Nostoc humifusum Carm. Cullingworth. 



Cylindrospermum macrospermum Kiitz. Halifax ; C. P. 

 Hobkirk. 



Fam . 1 1 . — Z } -NGB Y.E. 



Oscillaria tenerrima Kiitz. Doncaster. Kildwick. 



Oscillaria leptotricha Kiitz. Adel Bog ; W. and G. S. West. 



^Oscillaria tenuis Ag. Var. viridis. Manningham Park ; G. S. 

 West. 



Oscillaria muscorum Carm. Adel Bog ; Eldwick ; W. and 

 G. S. West. Doncaster. 



March 1889. 



