DIPPLUGIA CONSTRICTA. 55 



(1872), p. 144; in Ber. Akad. Wiss. Berlin, 1853, p. 332 ; 

 and Mikrogeol. (1854), t. xxxix, infra, f. 3. 



Difflugia pwteiformis sub.-sp. marswpiformis Wallich in 

 Ann. Nat. Hist. (3) XIII (1864), p. 241, t. xv, f. 5 a, 

 t. xvi, ff. 3-5 ; Leidy in Pr. Acad. Pliilad. 1877 (1878), 

 p. 307; Lagekheim in Forh. Geol. Foren. Stockliolm, 

 XXIII (1901), p. 512. 



Difflugia proteiformin sub.-sp. marsupiformis var. cassis 

 Wallich in Ann. Nat. Hist. (3) XIII (1864), p. 241, t. xv, 

 f . 5 b, c; t. xvi, f . 6 ; Leidy in Pr. Acad. Philad. 1877 

 (1878), p. 321. 



Arcella {Homoeochlamys) constricta Eheenbeeg in Abth. 

 Acad. Wiss. Berlin, 1871, p. 244. 



Diffl,ugia constricta Leidy (pars) Freshw. Ehiz. N. Amer. 

 (1879), p. 120, t. xviii, ff. 1-36, 45-57; in Proc. Acad. 

 Pliilad. 1879, p. 163; and op. c.it. 1880, pp. 33.5, 338; 

 Hitchcock Synops. Freshw. Rhiz. (1881), p. 15 ; De Taeb 

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 Daday in Ertesz. math, termesz. Akad. Budapest, III 

 (1885), p. 161; and in Sitzber. Acad. Wiss. Wien, CXII, 

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 (1886), p. 13, t. i, f. 14; ed. 2 (1895), p. 16, t. i, f. 18; 

 Imhof in Jaliresb. nat. Ges. Graubiind. XXX (1887), p. 

 65; Zool. Anzeig. XI (1888), p. 565; and in Arch. Sci. 

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 Ges. Nat. Marburg, 1888, 3, p. 108; Gueene Excurs. 

 zool. F;iyal et San Miguel (1888), pp. 32, 72; Sacchi in 

 Boll. Scient. Ill, an. 11 (1889), p. 68 ; andin Jrn. Microg. 

 XIV (1890), p. 109; Penaed in Me'm. Soc. Geneve, XXXI 

 (1890), 2, p. 148, t. V, ff. 1-16; in Jahrb. nassau. Ver. 

 Naturk. XLIII (1890), p. 70; in Arch. Sci. nat. (3) 

 XXVI (1891), p. 143; op. cit. (4) VII (1899), p. 262 

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 Rhiz. Leman (1902), p. 298, iJ. 1-16 (p. 299); in Arch. 

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 (1891), p. 12 ; Rhumblee in Zeits. wiss. Zool. LII, 4 (1891), 

 p. 518; and op. cit. LXI, 1 (1895), pp. 38, 46; Cash in 

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

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 and 6, p. 5; Loed in Tr. Manch. Micr. Soc. 1891 (1892), 

 p. 55; ScHEWiAKOPF in Mem. Acad. Sci. St. Petersb. (7) 

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