W. WEST AND G. S. WEST: ALGA-1'T,0RA OF YORKSHIRE, lit 



Gr.NUS GYMNOZYGA Ehrenb., 1840. 



528. Gymnozyga moniliformis Ehrenb., 1840. [Syn. 

 Desmidium Borreri Ralfs, 1843; Didyinoprium 

 Borreri Ralfs, 1845 ; Bambusina Brebissonii Kiitz., 



1845]- 

 S.AV.— Cullingworth. 



Mid W. — Malliam Tarn. Cocket Moss, near Giggleswick. 

 Ingleborough. 



N.W.— Mickle Fell. Lund's Fell. 



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



S.E. — Riccall and Skipwith Commons. 



Genus HYALOTIIECA Kulz., 1840. 



529. Hyalotheca dissiliens (Sm.) Breb. 



S W. — Greetland, near Halifax. Cullingworth. Keighley 

 Moor. 



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

 Ilkley. Malham Tarn. Cocket Moss, near Giggleswick (with 

 zygospores). Giggleswick Common (with zygospores). Bowland 

 Knotts. Bog two miles south of Clapham. Ingleborough. Cam 

 Fell. Near Buckden. 



N.W. — Baugh Fell. Mickle and Cronkley Fells. Great 

 Shunnor Fell. Lund's Fell (with zygospores). 



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

 Terrington, very large forms (with zygospores). Carlton Bank 

 (with zygospores). Stokesley (with zygospores). 



S.E. — Riccall Common (with zygospores). Skipwith Com- 

 mon. 



Forma tridentula Nordst. 



N.W.— Cronkley Fell. 

 Var. hians WoUe. 



Mid W. — Horton-in-Ribblesdale. 



N.W.— Cronkley Fell. 



530. Hyalotheca mucosa (Dillw.) Ehrenb 

 Mid W. — Cocket Moss, near Giggleswick. 



