74 BRITISH FRESHWATER 11H1ZOPODA. 



Test yellow, or rarely colourless, translucent, com- 

 posed of non-imbricated discs usually arranged in 

 diagonal rows on a thin cliitinous pellicle ; transverse 

 section circular; aperture circular, placed obliquely, 

 with a curved neck; plasma grey, partly filling the 

 test, containing many granules and food-particles; 

 nucleus large, granular, containing numerous nucleoles 

 and placed posteriorly ; one large and one smaller 

 contractile vesicle usually present; pseudopodia fili- 

 form, attenuate, long, straight or curved. 



FIG. 140. Portions of tests of Cyphoderia ampulla, x 2000. fc, with 



section. 



FIG. 141. Portions of tests of the same, x 2000. 



Length 61-190 ja (usually 100-140 /x); diameter 33- 

 72 fjL ; aperture 10-22 /x. 



Habitat. Wet mosses, sphagnum, and aquatic 

 vegetation. 



ENGLAND. Cumberland (Brown) ; "Westmorland 

 (West, Brown}; Lancashire (Cash) ; N. and W. York- 

 shire ; Isle of Man ; Cheshire (Gash) ; Derbyshire 

 (Brown); Warwickshire (Bolton); Bedfordshire; Essex 

 (Scourfield) ; Surrey (West). 



WALES. North Wales ! (Cash). Snowdon, Carnar- 

 vonshire, 3000 feet (West). 



SCOTLAND. Shetlands and Orkneys! (West) ; St. 



