. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. DIFPLUGIA. 6 has many species but is so well defined that very few have at any time been assigned erroneously to a different genus, perhaps only D. constricta and D. globulus, both of which Bhrenberg described as Arcellse, the latter however with a query. Besides Lecquereusia modesta some other species first included in Difflagia are now considered to be generically distinct, forming the types of such genera as Phri/ganella/Pontigulasia, and Trinema, and in 1880 Vejdovsky proposed to remove from it Difflu
. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. DIFPLUGIA. 6 has many species but is so well defined that very few have at any time been assigned erroneously to a different genus, perhaps only D. constricta and D. globulus, both of which Bhrenberg described as Arcellse, the latter however with a query. Besides Lecquereusia modesta some other species first included in Difflagia are now considered to be generically distinct, forming the types of such genera as Phri/ganella/Pontigulasia, and Trinema, and in 1880 Vejdovsky proposed to remove from it Difflugia corona under tlae name of Corona ']. Figs. 33-35.—Difflugia Leolero : 33, D. ohlonga ?; 34, D. acuminata ; 35, Lesquereusia modesta. After Leolerc, loc. cit., ff. 3, 5, and 1 a. All X about 150. This genus is more largely represented than any other in the rhizopodal life of our lakes and ponds. The tests vary in degree of opacity according as they are covered with extraneous matter or otherwise; generally they have a rough exterior, but forms are frequently met with in which the test, though opaque, is comparatively smooth, except for the presence of a few, and those generally large, scattered sand-grains. The varieties lacustris and venusta of D. oblonga Bhrenb. differ from the type in having a more or less transparent test composed of chitinous membrane with a surfacing of angular scales which vary in size and are probably Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cash, James, 1839-1909; Hopkinson, John, 1844-1919. joint author; Wailes, George Herbert, 1862-. London, Printed for the Ray Scociety
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