52 BRITISH FRESHWATER -KH1ZOPODA. 



1. Cryptodifflugia oviformis Penard. 

 (See Vol. II, pp. 79-80, fig, 78.) 



2. Cryptodifflugia compressa Penard. 



(Plate LX, figs. 14-16.) 



Cryptodifflugia compressa 

 PENARD Faune Bhiz. Leman (1902), p. 428, 3 figs. ; Sarcodines in 



Cat. Invert. Suisse (1905), pp. 82-83. 

 WAILES & PENARD in Proc. B. Irish Acad. XXXI, LXV (1911), 



pp. 9, 15, 23, p. i, f. 2. 

 WAILES in Jrn. Linn. Soc., Zool. XXXII (1912), pp. 124, 133; in 



Naturalist, 1913, p. 146. 

 PLAYFAIR in Proc. Linn. Soc. N. S. Wales, XLII, 4 (1918), p. 656, 



pi. xxxviii, f. 9. 



Test small, ovoid, yellowish-brown in colour, trans- 

 parent, homogeneous, compressed; transverse section 

 elliptical ; aperture terminal, elliptical, with a short 

 neck ; plasma clear, colourless, slightly granular ; 

 nucleus single, placed posteriorly, containing a small 

 central nucleole ; one or two contractile vesicles 

 usually present ; pseudopodia few, not long, pointed 

 or digitate. 



Length 17-20 /x ; breadth 14-18 /x; thickness 

 8-10 /x; aperture 5-6 /x by l'5-3 /x; nucleus about 

 2 p. in diameter. 



Habitat. Sphagnum and aquatic vegetation. 



ENGLAND. Cumberland (Brown) ; Lendall, West- 

 morland; N.Yorkshire; Shropshire; Buckinghamshire; 

 Chillenden, Kent; Isle of Wight. 



IRELAND. Belclare, Clare Island, and Caher Island, 

 Mayo. 



Not a common species, and usually occurring 

 in association with C. oviform its, a much more 

 abundant and generally-distributed species from 

 which the greatly -compressed test and elliptical 

 aperture distinguish it. The pseudopodia are very 

 rarely displayed, the plasma being more often seen 

 protruding from the aperture as a small lobular 



