120 BRITISH FRESHWATER RHJZOPODA. 



surface covered with small, lenticular or oval trans- 

 parent plates or discs, generally of uniform size, 

 mixed in some examples with angular plates or short 

 stoutish rods of chitinous or siliceous substance. The 

 outer margin, as well as the mouth, with a more or 

 less crenulate outline, on account of the prominence 

 there of the particles of which the test is composed, 

 and in such cases the structure is brittle and easily 

 fractured under pressure. Protoplasm and nucleus 

 corresponding with those of the allied species; the 

 pseudopodia, four or five in number, colourless, simple, 

 or sparingly branched. 



97 98 



^ 





FIGS. 97 AND 98. Nebela deniistoma : 97, an empty test from Dunham, 

 Cheshire, x 300 ; 98, an active individual from Knutsford, Cheshire, 

 x 350. 



Dimensions: Length 95-115 /n ; breadth 73-90 /x. 



In Sphagnum and amongst the rootlets of Bartramia 

 and other mosses in boggy places. Frequent in 

 Cheshire, in North Wales, as at Tan-y-Bwlch, and in 

 Scotland. Near Sutton Broad, Norfolk (E. Gurney). 

 Glyder Fawr, N. Wales, at 2700 feet (G. S. West). 

 Moel Siabod, N. Wales, at 2500 feet; Killough and 

 Calary Bog, Co. Wicklow, Ireland (/. HopMnson). 

 Loch Ness, Scotland (D. J. Scour field). 



This species may readily be distinguished from 

 forms of N. collaris Leidy, and of N. tincta (Leidy), 



