W. WEST AND G. S. WEST: ALGA-FLORA OF YORKSHIRE. 151 

 Genus ARTHROSPIRA Stizberger, 1852. 



748. Arthrospira Jenneri (Hass., 1845) Stizenberger, 

 1852. [Syn. Sptrulina Jenneri Kxxiz., 1845-49J. 



S.W.— Askern (Rev. F. H. Allen). 



Sub-Family Spirulinoide^. 

 Genus SPIRULINA Turpin, 1827. 



749. Spirulina major Kiitz., 1843. 



[Syn. Sptriili?ta oscillarioides Klitz., 1845-49]. 

 Mid W. — Brarahope (Abbott, Emsley and Turner). Adel. 

 Arthington. 



N.W.— Mickle Fell. 



N.E. — Scarborough Mere. Strensall. 



750. Spirulina tenuissima Kiitz., 1836. 



[Syn. Spirulina subsalsa CErsted, 1842]. 

 S.W.— Holmfirth (C. P. Hobkirk). 



Order CHAM^SIPHONACE^E. 

 Family CHAM^SIPHONE.^. 



Genus SPH.BROGONIUM Rostaf., 1883. 



751. Sphaerogonium incrustans (Grun.) Rostaf., 1883. 

 [Syn. Chamcesiphon i?icrustans Grun., 1868]. 

 S.W. — Heaton, on Vaucheria sp. and Rhizoclotiitim hieroglyp- 

 hiciim. Keighley, on CEdogonium sp. 



Mid W. — Baildon, on Cladophora crispata. In stream near 

 Giggleswick, on ChcBiomorpha. 



N.W. — Cautley Spout, on CEdogoniinn sp. Widdale Beck, on 

 P/ectonema. 



Order CHROOCOCCOIDE^. 

 Family CHROOCOCCACE^. 



Sub-Family Chroocyste^. 

 Genus GLCEOCH.'ETE Lagerh., 1883. 



752. Glceochaete Wittrockiana Lagerh., 1883. 



[Syn. Schrammia barbata Dangeard, 1889]. 

 Mid W. — Half-a-mile south of Cray Moss (viii. 1896). 

 N.E. — Pilmoor, near Thirsk, very fine (iv. 1897). 



