l8 YORKSHIRE NATURALISTS' UNION. 



lakes at Horton Park, Bradford. In the canal and in several 

 ponds, Frizinghall. Doncaster. 



Mid W. — Sherburn (F. A. Lees). Garforth, near Leeds 

 (W. B. Turner). 



N.E.— Carlton Bank. 



Genus PRASIOLA Ag., 1821. 



50. Prasiola crispa (Lightf.), Ag. 



S.W.— General. Huddersfield (C. P. Hobkirk). Copley (H. F. 

 Parsons). AUerton. Cullingworth. 



Mid W.— Wetherby (F. A. Lees). Leeds ! (J. Abbott). Rom- 

 bald's Moor ! (H. F. Parsons). Markington! (Rev. J. S. Tute). 

 Shipley. 



N.W.— Sedbergh. 



N. E. — Scarborough. 



Genus SCHIZOMERIS Kiitz., 1843. 



51. Schizomeris Leibleinii Kfitz. 



N.W. — On stones subject to the spray of a waterfall in Stone 

 Gill, Dodd Fell (iv. 1898). 



Not previously recorded for. the British Isles. 



Family ULOTRTCHACE^. 



Sub-Family UlotrichE/B. 



Gknus SCHIZOGONIUM Kiitz., 1843. 



52. Schizogonium murale Kiitz. 

 On damp ground, old walls, old wood, etc. 

 S.W.— Bradford. Swill Hill. 



Mid W.— Garforth (J. Abbott). 



Gknus HORMIDIUM Kiitz., 1843. 



53. Hormidium murale (Lyngb.), Kiitz. [Syn. Lyngbya 



muralis Ag., 1824; Ulothrix ladicansYJcAz., 1849]. 



S.VV. — Coley, near Shelf. Bradford. On shady rocks near 

 Bingley. 



Mid W. — Leeds. Roundhay (J. Abbott). Otley. Skipton. 

 Gordale (C. B. Crawshaw and C. P. Hobkirk). 



Trans. Y.N.U., 1896 (pub. Aug. 1900). Bot. Series, Vol. 5. 



