302 THE CHICAGO ACADEMY OF SCIENCES. 



1872. ADAMS, Thomp. Vt, p. 169, 1842. MORCH, Amer. Journ. Conch., IV, p. 33, 

 1868. 



Limnaus expansus KUSTER, Conch. Cab., I, p. 39, taf. 7, figs. 6, 7, 1862. 



Limnophysa expansa TRYON, Amer. Journ. Conch., I, p. 251, 1865. 



Lymnaa expansa WHEATLEY, Cat. U. S. Shells, p. 23, 1845. JAY, Cat., p. 

 269, 1852. 



Limn&a palustris expansa CKLL., Nautilus, XVI, p. 96, 1902. BAKER, Moll. 

 Chi. Area, II, p. 277, 1902. 



Limnceus suiHatus CALKINS, Ms. BAKER, Moll. Chi. Area., p. 277, pi. 32, 

 fig. 2, 1902. 



Limnea fragilis HALDEMAN, Mon. Lim., p. 20, pi. 6, pi. 15, fig. 1, 1842 (not 

 of Linne). DEKAY, Moll. N. Y., p. 68, pi. 4, fig. 68, 1843. LAPHAM, Trans. 

 Wis. State Ag. Soc., II, p. 368, 1853. KENNICOTT, Trans. 111. State Ag. Soc., I, 

 p. 595, 1855. HAMBACH, Bull. Geol. Surv. Mis., I, p. 60, 1890. 



Lymnaa fragilis JAY, Cat., p. 269, 1852. 



Limncea fragilis ULFFERS, Trans. 111. State Ag. Soc., I, p. 612, 1855. 

 SWALLOW, An. Rep. Geol. Surv. Missouri, II, p. 215, 1855. LAPHAM, Proc. Phil. 

 Acad., 1860, p. 155. GABB., Proc. Phil. Acad., 1861, p. 309. BLAND & COOPER, 

 Ann. N. Y. Lye. N. H., VII, p. 370, 1862. TRYON, Proc. Phil. Acad., 1863, 

 p. 149. CPR., Rep. Brit. Asso., 1864, p. 630. CURRIER, Kent. Sci. Inst, Mis. Pub. 

 No. 1, 1868. LEWIS, Amer. Journ. Conch., VI, p. 86, 1870. CPR., Smith. Mis. 

 Coll., 1873, p. 116. HARTMAN, Moll. Chester Co., Penn. 



Limnophysa fragilis DECAMP, Kent. Sci. Inst., Mis. Pub., No. 5, p. 8, 1881. 



Lymncea fragilis var. corvus PARR., JAY, Cat., ed. 4, p. 269, 1852. 



Lymnea nuttalliana 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. 



Lymncza nuttalliana WHEATLEY, Cat. U. S. Shells, p. 23, 1845. JAY, Cat., 

 p. 270, 1852. SCUDDER, Bull. Nat. Mus., 23, pp. 33, 43, 201, 1885. BAKER, Amer. 

 Nat., XL, pp. 329, 330, 1906. 



Limncea nuttalliana CARPENTER, Rep. Brit. Asso., 1856, p. 198, 316. CPR., 

 P. Z. S., 1856, pp. 209, 220. BINNEY, L. & F. W. Sh., N. A., II, p. 45, fig. 62, 

 1865. TRYON, Amer. Journ. Conch., Ill, p. 196, 1867. COOPER, Proc. Cal. Acad. 

 Sci., IV, p. 96, 1870. Sows., Conch. Icon., XVIII, Lim. sp. 70, pi. 11, figs. 70, 

 a, b, 1872 (the figures look like rowelli Tryon). SHIMEK, Bull. Lab. N. H. 

 Iowa Univ., I, p. 68, 1888. STEARNS, Proc. Nat. Mus., XIV, p. 101, 1891; N. Am. 

 Fauna, VII, p. 274, 1893. TAYLOR, Ottawa Nat., VIII, p. 148, 1895. STEARNS, 

 Proc. Nat. Mus., XXIV, p. 291, 1901. ELROD., Nautilus, XV, p. Ill, 1902; Bull. 

 Univ. Mont., Biol. Series, No. 3, p. 173, 1902. PILSBRY, Nautilus, XVII, p. 84, 

 1903. 



Limn&us nuttallianus KUSTER, Conch. Cab., I, p. 38, pi. 7, fig. 5, 1862. 



Limnea nuttalliana CARLTON, 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. CALL, Bull. Wash. Coll. Lab. N. H., 

 I, p. 52, 1885. KEYES, Bull. Essex Inst., XX, p. 70, 1888. 



Limn&a palustris nuttalliana BAKER, Moll. Chi. Area, II, p. 276, pi. 31, 

 fig. 6, 1902. 



