94 BRITISH FRESHWATER RHIZOPODA. 



Difflugia cellulifera EHRENBERG in Deutsche Nordpolarfahrt 



'(1874), II, pp. 460, 466, Zool. 15, t. iii, f. 24. 

 Difflugia (Nebela) numata LEIDY in Pr. Acad. Philad. 1874, 



p. 157. 

 Nebela numata LEIDY in Pr. Acad. Philad. 1876, p. 116, ff. 



1-5 ; and op. cit. 1877, p. 264. 

 Nebela collaris LEIDY (pars) in Proc. Acad. Philad. 1879, p. 



162; op. cit. 1880, pp. 335, 336; and Freshw. Rhiz. N. 



Amer. (1879), p. 145, t. xxii, ff. 1-10, 13-15, 17-20; t. 



xxiv, f. 11 ; and f. (p. 151) ; HITCHCOCK Synops. Freshw. 



Rhiz. (1881), p. 21; TARANKK in Sitzber. bohm. Ges. 



Wiss. 1881 (1882), p. 230; and in Abh. bohm. Ges. Wiss. 



(6) XI (1882), 8, p. 32 etc., t. i, ff. 3-12 ; t. ii, ff. 1-3; t. 



iv, ff. 1-3; WALLICH in Ann. Nat. Hist. (5) XVI (1885), 



p. 472 ; BLOCHMANN Mikr. Thierw. Siisswass. (1886), p. 



13, t. i, ff. 25, 25a; and ed. 2 (1895), p. 17, t. i, ff. 19, 



19a: FIELDE in Proc. Acad. Philad. 1887, pp. 122, 123; 



BARROIS Mater, etude faune A9ores, III (1888), p. 11 ; 



and in Me"m. Soc. Sci. Lille (5) VI (1896), p. 108 etc.; 



GREEFF in Sitzber. Ges. Nat. Marburg, 1888, 3, p. 109 ; 



GUERNE Excurs. zool. Fayal et San Miguel (1888), p. 109; 



HARVEY in Amer. Natur. XXII (1888), p. 73 ; IMHOF in 



Zool. Anzeig. XI (1888), p. 565 ; SACCHI in Boll, scient. 



III, an. 10 (1888), p. 46 ; and in Jrn. Microg. XII (1888), 

 p. 377 ; CERTES Prot. in Mission scient. Cap. Horn, VI, 

 3 (1889), pp. 11, 13, t. ii, ff. 2-5 ; PENARD in Jahrb. nassau. 

 Ver. Naturk. XLIII (1890), p. 71 ; in Mem. Soc. Geneve, 

 XXXI (1890), 2, p. 157, t. vi, ff. 21-44; in Amer. Natur. 

 XXV (1891), pp. 1071, 1073; Faune Rhiz. Leman (1902), 

 p. 347, ff. 1-7 ; in Arch. Protist. II (1903), p. 258; in Pr. 

 R. Soc. Edinb. XXV, 8 (1905), p. 594 etc. ; and in Jrn. R. 

 Micr. Soc. 1907,p. 278 ; LORD in Sci. Goss. XXVIII (1891), 

 p. 228, ff. 190-194; and in Tr. Manch. Micr. Soc. 1891 

 (1892), p. 56; CASH in Tr. Manch. Micr. Soc. 1891 (1892), 

 p. 50, t. ii, f. 24; SCHEWIAKOFF in Mem. Acad. Sci. 

 St. Petersb. (7) XLI (1893), 8, p. 98 ; LEVANDER in Acta 

 Soc. Fauna Fenn. XII (1894), 2, p. 19; and op. cit. XX 

 (1901), 8, p. 8 etc. ; FRANCE Prot. in Result. Erforsch. Bala- 

 tons. II, 1, (1897), p. 8; FRENZEL in Bibl. Zool. IV, 12 

 (1897), p. 148 ; FUHRMANN in Rev. Suisse Zool. IV 

 (1897), p. 504 etc.; SCHAUDINN in Deutsch-Ost-Africa, 



IV, 2 (1897), 19, p. 10; SCOURFIELD inPr. Zool. Soc. 1897, 

 p. 787 ; ANDRE in Jahresb. nat. Ges. Graubiind. XLI 

 (1898), p. 57 etc.; PROWAZEK in Zool. Anzeig. XXII 

 (1899), p. 344; in Arb. zool. Inst. Wien, XII, 3 (1900), 



