DIFFLTJG1A LOBOSTOMA. 45 



MOORE in Ann. Nat. Hist. (6) XI (1893), p. 48 ; SCHEWIA- 

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

 p. 98; DADAY in Termesz. Fiizetek. XX (1897), p. 156; 

 and op. tit. XXI (1898), Suppl. pp. 6, 9; ENTZ in Res. 

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

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

 Deutsch-Ost- Africa, IV, 2 (1897), 19, p. 9; ZACHARIAS in 

 Forschb. zool. Stat. Plon, V (1897), p. 113; FICK in Zool. 

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

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

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

 S.-Peterb. Obshch. XXX, 1 (1900), p. 239 ; op. tit. XXXI, 

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

 Susswass. Nat. Ges. St. Petersb. I (1901), p. 212; EYFERTH 

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

 13 ; GODET in Bull. Soc. Neuchatel, XXVIII (1900), p. 

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

 253 ; LAGEUHEIM in Forli. 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. 320; BEARDSLEY in Tr. 

 Amer. Micr. Soc. XXIII (1902), p. 57; ZYKOFF in Bull. 

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

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

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

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

 SCHORLEU & THALLWITZ in Ann. Biol. Lacustre, I, 2 

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

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

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

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

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

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



Difflugia crenulata LEIDY in Pr. Acad. Philad. 1874, p. 79. 



Difflugia lobostomata 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 



