. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. DIFFLUGIA CORONA. 51 ScHOUTEDEN in Aiiii. Biol. Lacusti-e, I, 3 (1906), pp. 344, 348, f. 21; ZscHOKKE in Arch. Hydrobiol. II, 1 (1906), p. 3; Lemmermann in Arch. Hydrobiol. II, 4 (1907), p. 537; Skoeikov in Bull. Acad. Sci. St. Petersb. (6) I (1907), pp. 124, 125, etc.; Hoogeneaad in Tydschr. Nederl. Dierk. Ver. (2) X, 4 (1908), p. 407 ; Landacbe in Pr. Davonport Acad. Sci. IV, 10 (1908), p. 428. Corona cornida Vejdovsky in Ges. Wiss. 1880 (1881), p. 137. Diffliogia acuminata var. furcata D
. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. DIFFLUGIA CORONA. 51 ScHOUTEDEN in Aiiii. Biol. Lacusti-e, I, 3 (1906), pp. 344, 348, f. 21; ZscHOKKE in Arch. Hydrobiol. II, 1 (1906), p. 3; Lemmermann in Arch. Hydrobiol. II, 4 (1907), p. 537; Skoeikov in Bull. Acad. Sci. St. Petersb. (6) I (1907), pp. 124, 125, etc.; Hoogeneaad in Tydschr. Nederl. Dierk. Ver. (2) X, 4 (1908), p. 407 ; Landacbe in Pr. Davonport Acad. Sci. IV, 10 (1908), p. 428. Corona cornida Vejdovsky in Ges. Wiss. 1880 (1881), p. 137. Diffliogia acuminata var. furcata Daday in Termesz. Piizetek, XV (1892), p. 32, t. i, f. 2. Test ovoid, inclining to spheroid, in transverse, or oral view, circular ; with a broadly-rounded crown fur-. FiG. 65.—A peculiar form of Difflugia corona with rounded spines and a large aperture, from Llyn Llydaw, Snowdon. From a drawing by G. S. West, x 200. nished with a variable number of conical spines; narrower at the mouth (Avhich in the side view is more or less convex) ; the mouth central, circular, its border multidentate, or multilobate, with a variable number of small, but perfectly regular divisions, num- bering from 12 to 20. Structure of the shell, as in D. lobostoma Leidy, incrusted with fine sand-grains, and opaque. Protoplasm colourless ; the pseudopodia numerous, long and rather thin, with a tendency to branch or bifurcate. Dimensions: Length 180-230 ^i; breadth about 160^.. 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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