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



Genus ARTHROSPIRA Stizberger, 1852. 

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

 1852. [Syn. Spirulina Jenneri Kiitz., 1845-49]. 



S.W.— Askern (Rev. F. H. Allen). 



Sub-Family Spirulinoide^. 

 Genus SPIRULINA Turpin, 1827. 



749- Spirulina major Kiitz., 1843. 



[Syn. SpifuUna oscillarioides Kiitz., 1845-49]. 

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

 Arthington. %^iy:^.f^„ZJ^^■ 

 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.ESIPHONACE^. 



Family CHAM^SIPHONE^. 



Genus SPHiEROGONIUM Rostaf., 1883. 



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

 [Syn. Cha?neesiphon incrustans Grun., 1868]. 

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

 hicum. Keighley, on (Edogonium sp. 



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

 Giggleswick, on ChcBtomorpha. 



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

 Plectoneina. 



Order CHROOCOCCOIDE.E. 

 Family CHROOCOCCACEyE. 



Sub-Family Chroocyste^. 

 Genus GLOiGCH/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). 



