TUTE : MICRO-FAUNA AND FLORA OK MARKINGTON. 1 53 



Cylindrospermum catenatum. Markington. 



Phacus longicauda. Markington. 



CEdogonium braunii. In the pond at Morcar. 



Closterium lunula. In ponds and the beck, caught in the inter- 

 stices of moss, etc., growing on stones. When the water is 

 squeezed out of the moss, the out-flowing dirty water contains 

 many Desmids and Diatoms, which appear after a time when 

 the water is placed in a vessel in the light. 



Closterium acerosum. 



Closterium griffiithsii. 



Closterium setaceum. 



Cosmarium botrytis. 



Hyalotheca desiliens. 



Euastrum oblongum. 



Desmidium swartzii. 



Ankistrodesmus falcatus. 



Scenidesmus obliquus. 



Scenidesmus quadricauda. Do., do. 



Staurastrum margaritaceum. Do., do. 



Pediastrum boryanum. Do., do. 



NostOC commune. In clear still pools, Markington. 



Batrachospermum moniliforme. Do. 



Melosira varians. In streams and small shallow ponds. 



Spirogyra quinina. Suddenly appeared one year, and filled the 

 mill-race with filaments about five or six feet long, but this has 

 not occurred since. 



Spirogyra nitida. In streams and small shallow ponds. 



Zygnema cruciata. Do., do. 



Mesocarpus SCalaris. In clear running water, in troughs, etc.. 

 High Birstwith. 



Ulothrix zonata? Do., do. 



Cladophora glomerata. Markington Beck and Mill-race. 



ChcEtophora elegans. Do., do. 



Ophiocytium majus. This rare plant is found at Aldfield, in a 

 pond lying in the angle made by the Ripon and Pateley Bridge 

 Road, and the road from the village of Aldfield. (See Micro- 

 graphic Dictionary, Ophiocytium). 



Vaucheria caespitosa. In a watering-trough, Cayton, Cayton 

 Gill Farm. Another species (I think) is common. 



May 1890. 



