W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 99 



N.W.— Mickle Fell. Lund's Fell. Mossdale Moor, Widdale 

 Fell. 



461. Staurastrum teliferum Ralfs. 



[Syn. 6". polytrichum Perty var. alpinuin Schmidle]. 

 S.W. — Cullingworth. 



Mid W. — Adel Dam (W. E. Turner). Wigton Moor. 

 N.W.— Mickle Fell. Great Shunnor Fell. 

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

 S.E. — Riccall and Skipwith Commons. 



462. Staurastrum g-ladiosum Turn. 

 Var. delicatulum var. n. 



A variety with more delicate spines, spines sometimes slightly 

 curved and fewer away from the angles. Length without spines 

 38 jw, with spines, 45 jw; breadth without spines 39 /x, with spines 

 49 /a; breadth of isthmus 14 /x. 



Mid W. — Malham Tarn. 



The form of the cells and the number and length of the 

 spines are nearer those of S. gladiosiun than any other species. 

 The semicells are more depressed than in S. telifemm and the 

 spines are longer and more delicate. 



463. Staurastrum polytrichum Perty. 



[Syn. 6". Pringsheimii ReinschJ. 

 Mid W. — Cocket Moss, near Giggleswick. Cautley Spout. 

 N.E.— Strensall (W. B. Turner). 



464. Staurastrum Saxonicum Buln. 



[Syn. ? S. bi/llosnm Benn.]. 

 S.W. — Denholme. 

 Mid W. — Near Buckden. Cam Fell. 



465. Staurastrum pilosum (Nag.) Arch. 

 S.W. — Cullingworth. 



Mid W.— Adel Dam! (W. B. Turner). Adel Bog. Malham 

 Tarn. Bog two miles south of Clapham. 



N.W. — Cautley Spout. Mickle and Cronkley Fells. Hunter's 

 Hole, Craydale Moor (1,900 ft.). 



N.E.— Strensall (W. B, Turner). Carlton Bank. 



