W. WEST AND G. S. WESt : ALGA-ELORA OF YORKSHIRE. 9 1 



410. Cosmarium pseudoexiguutn Racib. 



N.E. — Strensall Common : a form somewhat attenuated to- 

 wards the apices of the semicells. Length, 18 /i ; breadth, 7-7 

 /i ; thickness, 4 '8 ju. 



This species has not previously been recorded for the British 

 Isles. 



411. Cosmarium obliquum Nordst. 

 S.W.— CuUingworth. 



Mid W. — Malham Tarn Bog. Penyghent. Oughtershaw 

 Tarn (forma major Nordst). 



N.W.— Mickle Fell. Birkdale Tarn Moss. Lund's Fell. 

 Widdale Fell (2,000 ft.). Snaizeholme Beck. Cowgill Wold 

 Moss, Widdale Fell. 



N.E. — Peat deposit, Filey. 



412. Cosmarium rectangulare Grun. 1868. 



[Syn. C. gotlandicum Wittr. 1872]. 

 N.W.— Mickle Fell. 

 N.E. — Pilmoor, near Thirsk. 

 S.E.— Skipwith Common ! (Rev. W. Fowler). 



413. Cosmarium minimum West & G. S. West. 

 N.E. — Pilmoor, near Thirsk. 



Not previously recorded for the British Isles. 



414. Cosmarium succisum West. 

 Mid W. — Wigton Moor. 



S.E. — Riccall and Skipwith Commons. 



415. Cosmarium Heimerlii West & G. S. West. 



[Syn. C. mimdissvnum Heimerl non Arch.]. 

 Var. tumidum West & G. S. West. 

 A variety with the angles a little rounder; with an inflation on 

 each side of the vertical view. Length, 9-10 /i; breadth, 

 io-ii'5 jw.; breadth of isthmus, 2-5-3 /*; thickness, S'S ^ 

 S.W. — Greetland, near Halifax. 

 Mid W.— Ingleborough. Ribblehead. 

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



416. Cosmarium Sphagnicolum West & G. S. West. 

 Very minute, a little broader than long, moderately constricted, 



