114 YORKSHIRE NATURAIJSTS UNION. 



Genus GONIUM Miiller, 1773. 



542. Gonium pectorale Miiller. 



S.W. — Goole (H. F. Parsons). Wortley, near Leeds (W. B. 

 Turner). Cullingworth. 



Mid W.— Markington ! (Rev. J. S. Tute). 

 N.W.— Great Shunnor Fell. 



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

 S.E.— Kirkham Abbey (J. M. Kirk). Brackenholme. 

 Genus PANDORINA Bory, 1824; em Piingsh., 1S69. 



543. Pandorina morum (Miill), Bory. 



S.W. — Goole. Askern. Rawcliffe (H. F. Parsons). Bradford. 

 Frizinghall. 



Mid W.— Markington I (Rev. J. S. Tute). Rombald's Moor. 

 Bride Cross, above Farnley Moor. Bramhope ; York (J. Abbott). 



N.W.— Cronkley Fell. 



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

 Stokesley. Scarborough Mere ! (G. Massee). Saltburn. 



S.E. — Brackenholme. Market Weighton. Hornsea Mere. 

 Genus STEPHANOSFH.-ERA Cohn, 1852. 



544. Stephanosphaera pluvialis Cohn. 



Mid W. — Baildon Moor. Only obtained once, from a rain- 

 pool in a hollow of grit-rock. 



Genus CHLAMVDOMONAS Ehrenb., 1833. 



545. Chlamydomonas Pulvisculus (Miill.), Ehrenb. 

 S.W.— Frizinghall, abundant in pools (viii. 1896). 

 N.W.— Cowgill Wold Moss, Widdale Fell. Lund's Fell. 

 N.E. — Terrington. 



546. Chlamydomonas multifilis Ehrenb. 

 S.W. — Near Doncaster. Frizinghall, abundant. 



This species has not previously been recorded from the 



British Isles. 



Genus H.-EMATOCOCCUS Ag., 1828. 



547. Haematococcus lacustris (Girod.), Rostaf. [Syn. 



Volvox lacustris Ciirod. ; Chlaiitydococciis pluvialis 

 (Flot.), A. Br.]. 



Trans. Y.N. U., 1S99 (pub. July 1901). P.ot. Series, Vol 5. 



