DIFFLUGIA MANIC ATA. 39 



4. Difflugia manicata Penard. 

 (Plate LXI, fig. 10.) 



Difflugia manicata 



PENARD Faune Bhiz. Leman (1902), pp. 226-227, 5 figs. ; Sarcodines 



in Cat. Invert. Sui-sse (1905), p. 41. 

 AVERINTZEFF in Tradui S.-Peterb. Obshch. XXXVI, II (1906), 



p. 207. 



SCHOUTEDEN in Ann. Biol. lacustre, I, 3 (1906), pp. 344, 347. 

 ZSCHOKKE in Arch. Hydrobiol. II, 1 (1906), p. 3. 

 WAILES & PENARD in Proc. B. Irish Acad. XXXI, LXV (1911), p. 16. 

 WAILES in Scott. Nat. Hist. 1912, p. 60; in Naturalist, 1913, 



pp. 145, 146. 



Test small, ovoid, not compressed, yellow or brown 

 in colour, comparatively smooth ; aperture small, 

 circular, usually with a border of large quartz-grains ; 

 plasma pale-blue in colour enclosing starch-grains 

 and occasionally a few Zoochlorella-cells ; nucleus of 

 medium size, bluish, with a central nucleole ; pseudo- 

 podia not numerous, digitate or rarely branched. 



Length 60-80 JJL ; diameter two-thirds the length ; 

 aperture half the diameter. 



Habitat. Aquatic vegetation. 



ENGLAND. N. Yorkshire. 

 SCOTLAND. Outer Hebrides. 



IRELAND. Mayo and the islands off Clew Bay 

 (Penard). 



The brown colour and smooth test are charac- 

 teristic features of this species ; it is not of common 

 occurrence. 



5. Difflugia labiosa Wailes. 

 (Plate LXI, fig. 11.) 



Difflugia amphora 



PENARD in Bev. Suisse Zool. IX (1901), p. 237 ; Faune Bhiz. Leman 

 (1902), pp. 289-292, 8 figs. ; Sarcodines Grand Lacs (1905), pp. 26- 

 28, 111 ; Sarcodines in Cat. Invert, Suisse (1905), p. 56. (Non 

 Difflugia amphora EHRENBERG, 1872 ; LEIDY, 1874 ; AVERINTZEFF, 

 1906 ; nee D. urceolata var. amphora LEIDY, 1879.) 



Test large, ovoid, not compressed, formed of 

 variously-sized quartz -grains ; the furidus may vary 

 from hemispherical to conical, the anterior part of test 



