LIST OF 



DIATOMS FOUND NEAR DONCASTER. 



M. H. STILES, F.R.M.S. 



Doncaster. 



The following- list of fresh-water Diatoms is the result of the 

 examination of many gatherings obtained from various localities 

 in the neighbourhood of Doncaster during the past six years. 

 The localities are arranged in groups and are indicated by 

 initials, to which the following table serves as a guide :— 

 A. Askern, Wrancar Drain, Thorpe Brick-pond (7 miles). 



C. Cusworth, Scawthorpe, and Bentley (2 miles). 



D. Doncaster Town Water (from Firsby, Thrybergh, and 



Sheffield). 

 F. Firsby Reservoirs (7 miles). 



H. Hatfield West Moor, Hatfield Brick-pond, Sandall Brick- 

 pond, etc. (3 to 8 miles). 

 R. Roche Abbey and Stone (11 miles). 

 Ros. Rossington (5 miles). 



Rh. Red House Pond, near the Race-course (2 miles). 



The nomenclature and arrangement are those adopted in Van 

 Heurck's ' Diatomacea?,' 1896. Occasionally older synonyms are 

 inserted where it was thought that they would prove useful. 

 Those species and varieties marked thus (*■) do not appear, as far 

 as I am able to trace, in the list of Diatoms in Lees' 'Flora 

 of West Yorkshire.' I wish here to express my indebtedness 

 to Mr. W. West, F.L.S., and to Mr. J. Newton Coombe for 

 valuable help most freely rendered from time to time in the 

 compilation of this list, which, incomplete though it be, will yet 

 serve as the basis of a fairly representative local record. 

 Amphora ova/is (Kutz.). A.C. F.H.R.Ros. 



Var. af finis. * C. 



Var. pediculus. * D. H.R. 



Cymbella Ehrenbergii (Kutz.). * C. 



Cymbella cuspidata (Kutz.). A.C. 



Var. naviculiformis. * C. H.R. 



Cymbella subsequalis (Grun.). * C. 



Cymbella delicatula (Kutz.). * G, 



