334 THE CHICAGO ACADEMY OF SCIENCES. 
Lymnea reflexa GouLp, Lamarck’s Genera, p. 69, 1833—-Amer. Journ. 
Sci, XXXI, p. 36, 1837-—WuHEaTLEY, Cat. Sh. U. S., p. 23, 1845.—Jay, Cat., 
p. 270, 1852.—RereEve, Elements of Conch., p. 179, 1860.—WoLF, Amer. Journ: 
Conch., VI, p. 28, 1870.—ScuppeEr, Bull. Nat. Mus., 23, p. 201, 1885.—BaKEr, 
Amer. Nat., XXXIX, p. 671, 1905.—Datt, Alaska Moll., p. 77, fig. 58, 1905.— 
Baker, Bull. Ill. State Lab. N. H., VII, p. 105, 1906—Watker, Nautilus, XX, 
p. 82, 1906.—SteRKI, Proc. Ohio State Acad. Sci., IV, p. 382, 1907—BAakKeErR, 
Bull. Ill. State Lab. N. H., VIII, p. 493, pl. 25, fig. 1, 1910—H. Baxer, An. Rep. 
Mich. Acad. Sci., XII, p. 60, 1910. ~ 
Limnea reflexa iowaensis BAKER, Nautilus, XVIII, p. 10, 1904; Bull. Til. 
State Lab. N. H., VII, p. 106, 1906. 
Limneus palustris var, distortus RossMAssLER, Icon., I, p. 97, pl. 2, fig. 52, 
1835.—Binney, L. & F. W. Sh. N. A., II, p. 41, fig. 52, 1865. 
Limnea distorta JorpAN, Nova Acta Ksl.-Leop.-Carol. Deutsch Akad. 
Natur., XLV, p. 368, 1883:—CKLL., Journ. Conch., VI, p. 257, 1890. 
Limnophysa palustris CALL, Indiana Mollusca, pl. 8, fig. 5, 1900. 
Limnea reflexa crystalensis BAKER, Nautilus, XVIII, p. 11, 1904; Bull. 
Ill. State Lab. N. H., VII, p. 106, 1906; VIII, p. 493, pl. 25, figs. 2, 3, 1910. 
Lymnea reflexa crystalensis HANNA, Nautilus, XXIII, p. 96, 1909. 
Lymnea palustris michiganensis BAKER, Bull. Ill. State Lab. N. H., VIII, 
p. 493, pl. 25, figs. 4-8, 1910. 
SHELL: Very much elongated, narrow, thin, sometimes scalar ; 
color honey-yellow to black, sometimes obscurely longitudinally banded ; 
surface shining, covered with numerous closely crowded growth lines, 
with fine impressed spiral lines which reticulate the surface; the growth 
lines are also wavy and elevated, in some specimens forming ridges 
of considerable size; nuclear whorls smooth, brownish or blackish, in 
form like those of palustris (pl. XLIX, fig. K) ; whorls seven, flatly 
rounded, last whorl much compressed; the sixth and seventh whorls 
are much longer in comparison with their width than are any of the 
preceding whorls; spire very long and pointed, occupying nearly two- 
thirds of the entire length of the shell; sutures impressed; aperture 
lunate or elongate-ovate, narrowed at the upper part, very oblique and 
effuse in some specimens; peristome thin, sharp, thickened by a heavy 
callus or varix on the inside, the varix chocolate or purplish in color ; 
lower part of peristome dilated; inner lip narrow, reflected over the 
umbilical region, leaving a very small chink or entirely closing the 
umbilicus ; columella oblique, with a heavy plait across its center, run- 
ning up into the whorl; the callus on the parietal wall varies from a 
very thin wash to an erect, thick inner lip which causes the aperture 
to be continuous; axis twisted. 
