W. WEST AND G. S. WEST: ALGA-Ff.ORA OF YORKSHIRE. 1 29 

 Gexus PALMELLA Lyngli., 1817; Nag., 1849. 



621. Palmella mucosa Kiitz. 

 S.W. — Keighley. Doncaster. Goole. 

 Mid W. — Beamsley Beacon. 



N.W.— Cronkley Fell. Great Shunnor Fell. Cotterdale. 

 N.E.— Strensall! (W. B. Turner). 



622. Palmella hyalina Breb. 

 S.W.— CuUingvvorth (T. Hebden).^ 

 Mid W.— Garforth (H. F. Parson.s). 

 N.W.— Cotterdale. 



N.E.— Strensall (W. B. Turner). Scarborough Mere. 



Cenus EOTRVDINA Brel). 



623. Botrydina vulgaris Br^b. 



Mid W. — Harrogate (Abbott, Emsley and Turner). Head- 

 ingley (W. B. Turner). Penyghent. Ingleborough. Whernside. 

 Bolton Woods. Also in abundance on peat, Simon Seat. 



N.W. — Howgill Fells. In profusion amongst Teinr/i/iis 

 pellucida and Lemobrywn glmicum. 



Sur-Family Dictyosph^rievH. 

 Genus TETRACOCCUS West, 1892. 



624. Tetracoccus botryoides West. 

 S.E. — Skipwith Common. 



Genus BOTRYOCOCCUS Kiitz., 1849. 



625. Botryococcus Braunii Kiitz. 



S.W.— Bradford. Cragg Vale, towards Blackstone Edge. 



Mid W.— Arthington. Cray Moss. Giggleswick Common. 

 Two miles south of Clapham. 



N.W. — Bog near Widdale Beck. Great Shunnor Fell. 



N.E.— Gormire; Strensall (W. B. Turner). Pilmoor, near 

 Tliirsk. Near Scarborough. 



S.E. — Hornsea Mere. 



626. Botryococcus calcareus West. 

 Mid W. — Malham. 



