14 YORKSHIRE NATURALISTS' UNION. 



Class CHLOROPHYCEiE. 



Order CONFERVOIDE^: HETEROGAMY. 

 Family COLEOCHyETACEM. 

 Genus COLEOCH^TE Breb., 1844. 



12. Coleochjete scutata Breb., 1844. 



S.W. — Doncaster. Frequent about Bradford (on Elodea, etc.). 

 Shipley. 



Mid W.— Adel Bog (J. Abbott). 



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



S.E. — Skipwith Common. Market Weighton. 



13. Coleochaete orbicularis Pringsh. 



S.W. — Frizinghall Dam, on Elodea canadensis, reaching a dia- 

 meter 01 3 mm. ; (abundant, iii. 1895). 

 N.E. — Pilmoor, near Thirsk. 



14. Coleochaete soluta Pringsh. 

 N.E.— Pilmoor, near Thirsk. 



Species of this genus are, as a rule, epiphytic on aquatic 

 phanerogams : they are no doubt generally distributed, but are 

 very easily overlooked. 



Genus APHANOCH^TE Berth., 1878. 



15. Aphanochaete repens Berth. 



Mid W. — Baildon Moor, on Cladophora crispata and (Edo- 

 gonium macratidrum. Markington ! (Rev. J. S. Tute). Malham 

 Tarn Bog. 



N.E.— Malton. Saltburn. 



16. Aphanochsete pilosissima Schmidle. 

 Mid W. — Staveley Dam, near Knaresborough. 



N.W. — Lund's Fell, attached to Mougeotia sp. and to Zygnema 

 pectinatum. 



17. Aphanochsete polytricha Nordst. 



N.W. — Mossdale Moor, Widdale Fell; a small form, diam. 

 cell. 14 /i. Previously unrecorded for the British Isles. 



Trans. Y.N.U., 1896 (pub. Aug. igoo). Bot. Series, Vol. 5. 



