DIFFLUGIA MANICATTA. 39 
4. Difflugia manicata Penard. 
(Plate LXT, fig. 10.) 
Diflugia manicata 
PENARD Faune Rhiz. Léman (1902), pp. 226-227, 5 figs.; Sarcodinés 
in Cat. Invert. Suisse (1905), p. 41. 
AVERINTZEFF in Trudui S.-Peterb.’ Obshch. XXXVI, 11 (1906), 
p. 207. 
ScHOUTEDEN in Ann. Biol. lacustre, I, 3 (1906), pp. 344, 347. 
ZscHORKKE in Arch. Hydrobiol. II, 1 (1906), p. 3. 
Wares & PENARD in Proc. R. Irish Acad. XXXI, Lxv (1911), p. 16. 
Waites 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 »; diameter two-thirds the length; 
aperture half the diameter. 
Habitat.—Aquatic vegetation. 
Enotanp.—N. Yorkshire. 
Scortanp.—Outer Hebrides. 
Iretanp.—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.) 
Diffiugia amphora ; 
Pewnarp in Rev. Suisse Zool. [IX (1901), p. 237; Faune Rhiz. Léman 
(1902), pp. 289-292, 8 figs.; Sarcodinés Grand Lacs (1905), pp. 26- 
28, 111; Sarcodinés in Cat. Invert, Suisse (1905), p. 56. (Non 
Diflugia amphora EHRENBERG, 1872; Lerpy, 1874; AVERINTZEFF, 
1906; nec D. urceolata var. amphora LEtpy, 1879.) 
Test large, ovoid, not compressed, formed of 
variously-sized quartz-grains; the fundus may vary 
from hemispherical to conical, the anterior part of test 
