\V. WEST AND G. S. WEST: ALGA-FLOfeA OF YORKSHIRE. 12) 



6 10. Characium sp. 



S.W.— Keighley Moor (cfr. Journ. Bot., 1899, p. 222, t. 3915, 



f. 7). 



Genus STIPITOCOCCUS West & G. S. West. 



611. Stipitococcus urceolatus W. & G. S. West. 

 Lat. cell., 3-4'2 fi; altit. 6'S-io'S ju. ; long. stip. hyal. 4-6/*. 

 Mid VV. — Oughtershaw Tarn (1,800 feet), epiphytic on Mou- 



geotia sp. 



N.E. — Pilmoor, near Thirsk (vi. 1898). 



This interesting alga occurred in large numbers closely 

 clustered round some filaments of Mougeotia ; it seems to be 

 allied to the genus Peroniella Gobi, which is an epiphyte on 

 filamentous Desmidiece (e.g., P. hyalotheca), but is, however, 

 much smaller and of a diiiferent form, the expanded and irregular 

 apex being remarkable. The stalk is extremely liyaline, in fact 

 barely visible, and it is very likely on account of its extreme 

 tenuity that it was originally formed from the single cilium of a 

 zoospore as in Peromelia, although it is comparatively much 

 shorter. There was no trace of a lateral crack for the escape of 

 the zoospore, as in Peroniella, and it is more probable that the 

 zoospores would escape from the expanded apex of the cells. 



The measurements oi Peroniella in De Toni's Sylloge Algarum 

 appear to be wrong according to Gobi's figures (Scripta Botan., 

 Horti Univer. Imper. Petropolitans, torn, i, 1866-7, PP- 244- 



250, t. i). 



Sub-Family Endosph^re^. 

 Genus CHLOROCHYTRIUM Cohn. 



612. Chlorochytrium Lemnse Cohn. 



S.W. — On Lemna tris idea, Doncaster. On Z. ««Vw;-, Bradford. 



Sub-Family Tetraspore/E. 

 Genus SCHIZOCHLAMYS A. Br., 1849. 



613. Schizochlamys gelatinosa A. Br. 

 Mid W. — Adel Bog. Bingley. 



N.E.— Strensall. 



S.E. — Very fine in a pond near Meaux Abbey. 



