DIFPLUGIA LOBOSTOMA. 45 



MooEE in Ann. Nat. Hist. (6) XI (1893), p. 48; Schbwia- 

 KOPF in Mem. Acad. Sci. St. Petersb. (7) XLI (1893), 8, 

 p. 98 ; Daday in 'J ermesz. Piizetek. XX (1897), p. 156 ; 

 and op. cit. XXI (1898), Suppl. pp. 6, 9; Entz in Res. 

 wiss. Erforsch. Balatons. II (1897), l,p. xxiv; Fuhemann 

 in Rev. Suisse Zool. IV (1897), p. 510 etc.; ScHAUDiNNin 

 Deutsch-Ost- Africa, lY, 2 (1897), 19, p. 9; Zachaeias in 

 Forschb. zool. Stat. Plon, V (1897), p. 113; FiCKinZool. 

 Centralbl. V (1898), p. 324; Hempel in Bull. Illinois State 

 Lab. V (1898), p. 319; Steneoos in Acta. Soc. Fauna 

 Fenn. XVII (1898), 1, p. 34 etc. ; Aveeintzet in Trudui 

 S.-Peterb. Obshcli. XXX, 1 (1900), p. 239 ; op. cit. XXXI, 

 1 (1901), p. 212; XXXVI (1906), 2, p. 186; and in Ber. 

 Siisswass. Nat. Ges. St. Petersb. I (1901), p. 212; EypEETH 

 Naturgesch. mikr. Siisswass. ed. 3 (1900), p. 263, t. ix, f. 

 13; GoDETin Bull. Soc. Neucbatel, XXVIII (1900), p. 

 77; Peowazek in Arb. zool. Inst. Wien, XII (1900), p. 

 253 ; Lageuheim in Forh. Geol. Foren. Stockholm, XXIII, 

 6 (1901), p. 511 etc. ; Lang Lehrb. vergl. Anat., Prot. 

 (1901), pp. 91, 270, ff. 102, 251; Sand Etude Infus. 

 tentaculif. (1901), pp. 82, 134; G. S. West in Jrn. Linn. 

 Soc, Zool. XXVIII (1901), p. 820; Beaedsley in Tr. 

 Anier. Micr. Soc. XXIII (1902), p. 57; Zykopp in Bull. 

 Soc. Nat. Moscou, XXVII (1903), 1, p. 16, f. 7 ; Mueeay 

 in Pr. R. Soc. Edinb. XXV, 8 (1905), p. 609; Cushmann 

 in Amer. Natur. XL (1906), p. 372; Bdmonston in Pr. 

 Davenport Acad. Sci. XI (1906), p. 15, t. ii, f. 10; 

 ScHOELER & Thallwitz ill Ann. Biol. Lacustre, I, 2 

 (1906), pp. 260, 286; Schouteden in Ann. Biol. Lacustre, 

 I, 3 (1906), pp. 341, 345, f. 20; Le Ronx in Ann. Biol. 

 Lacustre, II, 3 (1907), p. 368 ; Skoeikov in Bull. Acad. 

 Sci. St. Petersb. (6) I (1907), p. 120 etc.; Landacee in 

 Tr. Ohio Acad. Sci. IV, 10 (1908), p. 428; Sohneidbe in 

 Arch. Biontol. II, 1 (1908), p. 58. 



Bifflugia cremolata Leidy in Pr. Acad. Philad. 1874, p. 79. 



Difflugia lohostomata Hempel in Bull. Illinois State Lab. V 

 (1898), p. 319; Calkins Prot. (1901), f. 118 a-c. 



Test variable in form — sub-spherical to ovoid — 

 composed of fine sand-grains or muddy particles, 

 smooth-surfaced, opaque, without neck; the mouth 

 3-6 lobed, the lobes with rounded sinuses, and of 

 regular formation, without any accompaniment of 

 larger quartz-grains. Protoplasm colourless, except 



