302 THE CHICAGO ACADEMY OF SCIENCES. 
1872.—ApaAms, Thomp. Vt., p. 169, 1842—Morcu, Amer. Journ. Conch., IV, p. 33, 
1868. 
Limneus expansus Ktster, Conch. Cab., I, p. 39, taf. 7, figs. 6, 7, 1862. 
Limnophysa expansa Tryon, Amer. Journ. Conch., I, p. 251, 1865. 
Lymne@a expansa WHEATLEY, Cat. U. S. Shells, p. 23, 1845—Jay, Cat., p. 
269, 1852. 
Limnea palustris expansa CKu., Nautilus, XVI, p. 96, 1902.—Baxer, Moll. 
Chi. Area, II, p, 277, 1902. 
Limneus suffatus CaLKins, Ms. Baker, Moll. Chi. Area., p. 277, pl. 32, 
fig. 2, 1902. 
Limnea fragilis HALDEMAN, Mon. Lim., p. 20, pl. 6, pl. 15, fig. 1, 1842 (not 
of Linné).—DerKay, Moll. N. Y., p. 68, pl. 4, fig. 68, 1843—DLapHAM, Trans. 
Wis. State Ag. Soc., II, p. 368, 1853—Kennicort, Trans. Ill. State Ag. Soc., I, 
p. 595, 1855 —Hampacu, Bull. Geol. Surv. Mis., I, p. 60, 1890. 
Lymnea fragilis JAy, Cat., p. 269, 1852. 
Limnea fragilis Utrrers, Trans. Ill. State Ag. Soc. I, p. 612, 1855.— 
SwaALtow, An. Rep. Geol. Surv. Missouri, II, p. 215, 1855—LapHaAm, Proc. Phil. 
Acad., 1860, p. 155.—Gasp., Proc. Phil. Acad., 1861, p. 309.—BLAND & COopER, 
Ann Ne Ye Wyc) No Ho Vill, ps.3705 1862—TRvon, Proc. Phils Acadeelsoas 
p. 149—Cpr., Rep. Brit. Asso., 1864, p. 630.—CurrirR, Kent. Sci. Inst., Mis. Pub. 
No. 1, 1868.—Lrewis, Amer. Journ. Conch., VI, p. 86, 1870.—Cpr., Smith. Mis. 
Coll., 1873, p. 116—Hartman, Moll. Chester Co., Penn. 
Limnophysa fragilis DeECAmp, Kent. Sci. Inst., Mis. Pub., No. 5, p. 8, 1881. 
Lymnea fragilis var. coruvus Parr., JAY, Cat., ed. 4, p. 269, 1852. 
Lymnea nuttalliiana LEA, Proc. Amer. Phil. Soc., II, p. 33, 1841; Trans. 
Amer. Phil. Soc., IX, p. 9, 1844; Obs., IV, p. 9, 1848; Hayden’s expl. Neb., p. 
724, 1859; Journ. Phil. Acad., VI, p. 160, 1866; Obs., XI, p. 116, 1867. 
Lymnea nuttalliana WHEATLEY, Cat. U. S. Shells, p. 23, 1845.—Jay, Cat., 
p. 270, 1852.—Scupper, Bull. Nat. Mus., 23, pp. 33, 43, 201, 1885—-BAKeEr, Amer. 
Nat., XL, pp. 329, 330, 1906. 
Limnea nuttalliana CARPENTER, Rep. Brit. Asso., 1856, p. 198, 316.—CprR., 
P. Z. S., 1856, pp. 209, 220—Binney, L. & F. W. Sh. N. A., II, p. 45, fig. 62, 
1865.—Tryon, Amer. Journ. Conch., III, p. 196, 1867—Cooprer, Proc. Cal. Acad. 
Sci., IV, p. 96, 1870—Sows., Conch. Icon., XVIII, Lim. sp. 70, pl. 11, figs. 70, 
a, b, 1872 (the figures look like rowelli Tryon).—SuHimek, Bull. Lab. N. H. 
Towa Univ., I, p. 68, 1888—STEARNS, Proc. Nat. Mus., XIV, p. 101, 1891; N. Am. 
Fauna, VII, p. 274, 1893—Taytor, Ottawa Nat., VIII, p. 148, 1895.—STEARNS, 
Proc. Nat. Mus., XXIV, p. 291, 1901—ELrop., Nautilus, XV, p. 111, 1902; Bull. 
Univ. Mont., Biol. Series, No. 3, p. 173, 1902.—Pizspry, Nautilus, XVII, p. 84, 
1903. 
Limneus nuttallianus KGster, Conch. Cab., I, p. 38, pl. 7, fig. 5, 1862. 
Limnea nuttalliana Cartton, Proc. Cal. Acad. Sci., IV, p. 51, 1869.—Cat. 
Coll. Nat. Hist. Eth. Prov. Mus. Victoria, p. 95, 1898. 
Limnophysa nuttalliana Tryon, Amer. Journ. Conch. I, p. 250, 1865.— 
Cooper, Proc. Cal..Acad., IV, p. 153, 1870—Catt, Bull. Wash. Coll. Lab. N. H., 
I, p. 52, 1885.—Keyes, Bull. Essex Inst., XX, p. 70, 1888. 
Limnea palustris nuttalliana Baker, Moll. Chi. Area, II, p. 276, pl. 31, 
fig. 6, 1902. 
