122 BIUTISH PBESHWATEE RHIZOPODA. 



Test ovoid, yellowish-brown in colour, compressed, 

 covered with small plates and foreign particles; in 

 narrow side view with rounded fundus and sides 

 tapering towards the aperture ; aperture flexible, of 

 variable shape ; plasma granular, usually containing 

 food-particles; a contractile vesicle placed anteriorly 

 usually present; pseudojpodia numerous, attenuate, 

 radiating, and branched. 



Length 55-70 /x; breadth 35-42 /x.; thickness 25- 

 30 /x; aperture 12-14 /x. 



Hahiiaf.- — Sphagnum and aquatic vegetation. 



England. — Golf-links, Sandown, Isle of Wight. 

 Ireland. — Salt marsh ditch, Clare Island, and lake 

 on Inishturk, Mayo. 



The limits of this species are difficult to define as 

 the amount of compression of the test and the form of 

 the aperture are subject to considerable variation. 



Genus 43. DIAPHOROPODON Archer, 1869. 



? Plagiophrys Clapaeede & Lachmann (pars) Etudes Inf. 



et Rhiz. 1, 2 (1859), p. 453. 

 Diaphoropodoii Aechee in Qrt. Jrn. Micr. Sci. (n. s.) IX 



(1869), pp. 394-397. (Diagnosis of genus, op. cit. (n. s.) 



X (1870), p. 123.) 

 ? Gromia Blochmann (pars) Mikr. Thierw. Siisswass. (1886), 



p. 15. 

 Diaphorodon Penaed Sarcodines in Cat. Invert. Suisse 



(1905), p. 89. 



Test ovoid, membranous, flexible, covered with fine 

 extraneous particles and furnished with a thick cover- 

 ing of fine, hyaline, hair-like cils; pseudopodia long, 

 filose, branching, not anastomosing. 



In general appearance and specific characters this 

 genus, containing a single species, is similar to the 

 genus Pseudodifflugia, but is distinguished by the 

 pi'esence of fine hair-like cils thickly covering the test; 

 these are so fine and transparent that they have the 

 appearance (under low powers) of a hyaline investment 



