44 BRITISH FBESHWATBE. HHIZOPODA. 



the form of its crown and aperture, D. cunphoralis 

 seems to be clearly entitled to specific rank. It 

 cannot be called Difflugia amplwra, that name having 

 been used by Ehrenberg in 1871. In mentioning only 

 Penard's D. amphora, which is not a variety of D. 

 urceolata, but a distinct and well-marked species, Mr. 

 Cash has apparently overlooked at least one form of 

 Leidy's variety of that name with which D. amplwralis 

 appears to be identical.] 



18. Difflugia lobostoma Leidy.* 



(Plate XXI, figs. 14-17 ; and figs. 58, 59, and 61 

 in text.) 



Difflugia tricuspis Caetbe ? in Ann. Nat. Hist. (2) XYIII 

 (1856), pp. 221, 247, t. vii, f. 80; Ehrenbeeg in Abh. 

 Akad. wiss. Berlin, 1871 (1872), p. 264. 



Difflugia ohlonga Fkesenios in Abth. Senkenb. nat. Ges. II 

 (1857), p. 225, t. xii, ff. 43-45; Eyfeeth Naturgesch. 

 mikr. Siisswass. ed. 2 (1885), p. 51, t. iii, f. 34. 



Difflugia lohostoma Leidy (pars) in Pr. Acad. Philad. 1874, 

 p. 79; op. cit. 1877 (1878), p. 307; 1881, p. 10; and 

 Freslivv. Rhiz. N. Amer. (1879), p. 112, t. xv, ff. 1-14, 

 20-24 ; t. xvi, if. 25-29 ; Hitchcock Synops. Freshw. 

 Rhiz. (1881), p. 14; Taeanek in Sitzber. bolim. Ges. Wiss. 

 1881 (1882), p. 227; De Taee in Rep. N. York State 

 Mus. XXXV (1884), p. 166 ; Fiblde in Pr. Acad. Philad. 

 1887, p. 122; Ceetes Prot. in Mission Scient. Cap. Horn, 

 YI (1889), 3, 13; Penaed in Jalirb. nassau. Ver. Naturk. 

 XLIII (1890), p. 70 ; in M6m. Soc. Geneve, XXXI (1890), 

 2, p. 147, t. iv, ff. 72-90, 96 ; in Arch. Sci. nat. (4) ^'11 

 (1899), p. 253 etc. ; in Rev. Suisse Zool. VIII, 3 (1900), 

 p. 485; and Faune Rhiz. Leman (1902), p. 276, ff. 1-7 

 (p. 277) ; Veewgen in Zeits. wiss. Zool. L, 2 (1890), p. 444, 

 t. xviii, and text-ff. a~c; Rhumblee in Zeits. wiss. Zool. 

 LII, 4 (1891), p. 547; op. cit. LXI, 1 (1895), (.. 44; and 

 in Biol. Centralbl. XVIII (1898), p. 36, f. 2; Cash in Tr. 

 Manch. Micr. Soc. 1891 (1892), p. 48; Levandee in 

 Arch. Ver. Mecklenb. XLVII (1892), p. 114; in Acta Soc. 

 Fauna Fenn. XII (1894), 2, p. 16, t. i, ff. 10-18; oi;. cH 

 XIX (1900), 2, p. 52; XX (1901), 5, p. 11 etc. ; 6. p. 5; 

 8, p. 8 etc.; and in Zool. Anzeig. XVII (1894), p. 209; 



* [Difflugia tricuspis Carter : Cash, MS. J 



