\V. WEST AND G. S. WEST- ALGA-FLORA OF YORKSHIRE. II5 



S.W. — More or less general in stagnaiU rain-water. Wibsey. 

 Manningham. Keighley Moor. 



Mid VV.— Baildon. Leeds (J. Abbott). Harrogate (T. Hick). 

 Boston Spa. 



N.W.— Cotterdale. 



N.E.— Strensall ! (W. B. Turner). Seamer. Scarborough 

 Mere. 



S.E. — Beverley. 



Family PALMELLACE^. 



Suh-Family Ccenobie^. 



Genus HYDRODICTVON Roth., 1800. 



548. Hydrodictyon reticulatum (L.), Lagerh. [Syn. 



Conferva reticulata L. ; Hydrodictyon utriculatum 

 Roth.J. 

 N.E. — Scarborough Mere! (G. Massee). 



Genus CCELASTRUM Nag., 1849. 



549. Coelastrum sphaericum Nag. 

 S.W.— Keighley Moor. 



Mid W. — Fenyghent. 



N.E. — Pilraoor, near Thirsk. Terrington. 



S.E. — Riccall and Skipwith Commons. 



550. CcElastrum microporum Nag. 

 Mid W.— Adel. Malham Tarn. 



N.E. — Scarborough Mere. 

 S.E. — Riccall Common. 



551. Coelastrum pulchrum Schmidle. 



Mid W. — Roundhay Park, Leeds. Staveley ]\ini, near 

 Knaresborough. 



N.E. — Pilmoor, near Thirsk. 



552. Coelastrum cubicum Nag. 

 N.E. — Pilmoor, near Thirsk. 



553. Coelastrum verrucosum Reinsch. 

 N.E. — Pilmoor, near Thirsk. 



