Yorkshire Naturalists at Askern. 



257 



Pool, and sixty-one species were observed, a few being new 

 records for the district. The edible Amanita rubescens was 

 seen in great abundance, also a number of the usual species 

 of Mycena and Marasmius. 



The rare Polyporus alutacens was found, and has been 

 determined by Mr. Crossland. 



A number of fairly common Ascomycetes were observed, 

 including Lachnea erinacea. 



The Myxos. included Arcyria pomiformis, the second York- 

 shire record for this minute organism. 



Total collected and observed : — 



61 



For the Micro Section, Mr. M. H. Stiles reports as follows : — 

 In making our gatherings at Shirley Pool, we had the advantage 

 of the use of a boat, and thus were enabled to reach portions 

 of the Pool which otherwise would have been inaccessible. 



Using the collecting apparatus as a tow-net, we secured 

 samples of the Plankton life of the Pool, consisting mainly 

 of Rotifers, which were sent on to Mr. H. Moore, of Rotherham, 

 for determination. He states : — ' The tube sent was very 

 satisfactory, containing AnurcBa acttleata Ehr, Anurcea coch- 

 lear ea Gosse, Asplanchna hrightwelli Gosse, Brachionus angu- 

 laris Gosse, arid Pomphalyx sulcata Hudson. The two species 

 of Anursea are common in most places, but the other three 

 species I rarely meet with about this district.' 



The fresh-water Sponge, Spongilla lacustris, was much in 

 evidence, a submerged branch being almost completely covered 

 with this interesting type. 



Floating on the water were found two olive-green gelatinous 

 masses, one of them of comparatively large size, about i| inches 

 by if inches and | inch thick, which Mr, W. West was good 

 enough to examine. It proved to be Aphanothece prasina, 

 a species not recorded in his 'Alga Flora of Yorkshire.' 



Diatoms. — The following list comprises those at present 

 determined, but further examination will doubtless result 

 in an extension, which I hope to communicate to a future 

 issue. 



The genera most abundant were Diatoma, Gomphonema, 

 Epithemia, Cymhella and Synedra. 



1912 Aug. I. 



