to6 YORKSHIRE NATURALISTS' UNION. 



499- — Staurastrum paradoxum Meyen. 

 Mid W. — Blubberhouses (W. 13. Turner). Bride Cross, above 

 Farnley Moor. Ribblebead. 



N.E.— Strensall ! (W. B. Turner). 

 S.E. — Riccall Common. 



Var. longipes Nordst. 

 N.E.— Strensall. 



500. Staurastrum oxyacanthum Arcb. 1859. [.Syn. 



6". scorpiflideum Delp. 1877 var. hrevis Gutw. 1890.] 

 Mid W. — Cocket Moss, near Giggleswink. 

 S.E. — Riccall Common. 



501. Staurastrum controversum Bre'b. 

 Mid ^V. — Bog two miles soutb of Clapham. 

 N.E. — Pilmoor, near Tbirsk. 



S.E. — Riccall Common. 



502. Staurastrum aculeatum (Ebrenb.) Mcnegb. 

 N.E. — Strensall (W. B. Turner). 



503. Staurastrum vestitum Ralfs. 

 S.E. — Riccall Common. 



504. Staurastrum Pseudosebaldi Wille. 

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



505. Staurastrum Sebaldi Reinscb. 

 Mid W. — Malbam Tarn. 



N.E.— Gormire; Strensall! (\\' . B. Turner). Pilmoor, near 

 Tbirsk. 



Var. ornatum Nordst. 

 N.E. — Pilmoor, near Tbirsk. 



506. Staurastrum Borgeanum Scbmidle. 

 N.W. — Bog near Widdale Beck. 



This species was described and figured by Scbmidle in Bihang 

 till K. Sv. Vet.-Akad. Hand!. 1898, Bd. 24, afd. iii., no. 8, p. 60, 

 t. iii., f. 7. His figure is, bowever, a very poor representation of 

 tbe species. It was only known previously from Pappmark. 



Lengtb, 45 /x ; breadtb, 43-48 /'. ; breadtb of istbmus, 12 }x. 



Trans. 'S'.N.U., 1899 {|mb. jul\- lyoi). ImH. Sciit;s, Vol. 5, 



I 



