82 BRITISH PEESHWATER RHIZOPODA. 



Test with hemispherical or slightly flattened fundus, 

 circular in transverse section ; formed of imbricated 

 bi-convex discs arranged in diagonal rows; plasma and 

 pseudopodia as in the type. 



Fig. 149. — Portion of a test of Cyphoderia irochns var. amphoralis. 

 X 2000. 



Length 87-153 /x; diameter 38-52 /a; aperture 

 12-20 /x. 



Habitat. — Sphagnum, mosses, atid aquatic vegeta- 

 tion. 



» 



,1 





PiQ. 150. — Portion of a test of Cyphoderia trochus var. amphoralis. 

 X 2000. a, portion of surface ; h, optical section of same ; c, 

 transverse section. 



England. — Westmorland ; Isle of Man ; Yorkshire ; 

 Derbyshire (Brown) ; Bedfordshire ; Hampshire ; Isle 

 of Wight. 



Wales. — Llyn Crafnant, Carnarvonshire (Hopk.). 



Scotland. — Shetlands ; Loch Ness, Inverness-shire 

 {Pe-nard) ; Skye. 



Ireland. — Mayo and the islands off Clew Bay; 

 Wicklow; Kerry. 



