ALLOGEOMIA FLUVIALIS. 139 



Calkins Protozoa (1901), p. 285. 

 Chapman Foraminifera (1902), p. 70. 

 Pbnard Faune Rhiz. Leman (1902), pp. 554-556, 3 figs. 

 Schmidt in Arcli. Protist. XXIX (1913, p. 223. 

 Gromia terricola 

 Leidy in Proc. Acad. PHlad. 1874, p. 88; in Areh. Sci. nat.-LII 



(1875), p. 167; Freshw. Rhiz. N. Amer. (1879), pp. 277-281, pi. 



xlvii, ff. 1-4. 

 Lawson in M. Micr. Jrn. XIII (1875), pp. 87-88. 

 Hitchcock Synops. Freshw. Rhiz. (1881), p. 51. 

 Blanc in Arch. Sci. nat. (3), XVII (1886), p. 365. 

 Blochmann Mikr. Thiei-w. Siisswass. (1886), p. 15 ; ed. 2 (1895), 



p. 19, pL i, f. 28. 

 ScHBWiAKOl-F in Mem. Acad. St. Petersb. (7) XLI, viii (1893), 



p. 98. 

 A llogromia fluvia lis 



Rhumblbe in Arch. Protist. Ill (1903), p. 206, f. 22. 

 Pbnakd Saroodines in Oat. Invert. Suisse (1905), pp. 119-120. 

 Allogromia fluviatilis 



Atbbintzbfp in Trudui S.-Peterb. Obshch. XXXVI, ll (1906), 



pp. 325-326. 

 Schoutbdbn in Ann. Biol, lacustre, I (1906), p. 375. 

 Haetog in Encycl. Brit., ed. 11, XXIII (1911), p. 248, f. 7 (4). 

 Lieberhuhnia fluvialis 



Pbnaed (pars) in Arch. Protist. IX (1909), pp. 293-296 {non fig.). 



Test membranous, spherical or ovoid, transparent, 

 supple, smooth or sparsely covered with' silicious 

 particles ; plasma slightly yellow, granular, usually 

 containing food-particles, nearly filling the test ; aper- 

 ture not observed; peduncle not observed; nucleus 

 single, large, and granular ; contractile vesicles numer- 

 ous; pseudopodia long, anastomosing, often enveloping 

 the test. 



Length usually 80-1 20 jju, but may vary between 50 

 and 250 /a. 



Habitat. — Aquatic vegetation and mosses. 



England. — Brigg, Lincolnshire (West). 

 Ibeland. — Connemara {Archer). 



Individuals found in mosses seem to have tests better 

 protected by extraneous particles than those living 

 amongst Alg£e. 



Penard's identification* of Gromia flrmalis Dujardin 

 with Gromia terricola Leidy has been adopted. 



* 'ArchiT. f. Protist.' VII (1909), pp. 293-296. 



