LYMNZIDZ OF NORTH AMERICA. 341 
Iowaensis Baker cannot be separated from refieva in a large series, 
and must become a synonym (pl. XXXV, fig. 9) ; the characters relied 
upon in the diagnosis are not constant, being founded on an immature 
condition. In the Illinois and Michigan Canal at Joliet, Illinois, 
occurs a form of reflexa which is subject to many peculiar pathologic 
variations. These affect the spire and the aperture, and produce many 
strange forms. Plate XXXVI, figures 1 to 6, illustrate a few of these 
variations, and several measurements are. given below: 
Length. Width. Aperture length. Width. 
20.00 10.00 11.50 6.00 mill. 
21.00 9.00 11.00 6.00 
22.50 10.00 11.00 6.00 
28.00 9.50 11.50 6.50 
When at its best, reffe.ra is easily the handsomest Lymnza of the 
American fauna, with its long, graceful spire and rich chestnut brown 
color. 
Galba reflexa walkeri (Baker). Plate XXXVI, figures 12-18. 
Limnea reflexa scalaris WALKER, Nautilus, VI, p. 33, pl. 1, fig. 7, 1892 
(not scalaris A. BRAUN, 1853, or SoweERBy, 1872, or VAN DEN BroeEck, 1872) .— 
WALKER, Rev. Moll. Mich., pp. 7, 17, 1894; Nautilus, VII, p. 128, 1894.—BakeEr, 
Trans. Acad. Sci. St. Louis, XL, p. 21, pl. 1, fig. 7, 1901—WaALKER & LANE, 
Geol. Surv. Mich., VII, pt. 2, p. 251, 1900. 
Limnea refexa walkeri BAKER, Moll. Chi. Area., II, p. 281, pl. 31, fig. 2, 
1902. 
Lymnea reflexa walkeri BAKER, Bull. Ill. State Lab. N. H., VII, p. 106, 
1906. 
Limnea reflexa var. distortus WALKER, Journ. Conch., II, p. 330, 1879. 
Limnea reflexa distortus WALKER, Rev. Moll. Mich., p. 17, 1894. 
SHELL: Much elongated, narrow, scalariform; color and surface 
sculpture as in reflexa; whorls 7 to 7!4, rounded, very long; spire over 
twice as long as the aperture; sutures much indented; aperture nar- 
rower and longer than in reffe.ra, the inner lip frequently erect and 
the aperture continuous. 
Length. Width. Aperture length. Width. 
37.00 11.00 12.00 6.00 mill. Calumet Lake, IIl. 
35.50 9.50 12.50 5000s = a 3 
35.50 9.00 11.00 5.00 “ Joliet, Ill. 
37.50 9.00 12.50 6:00), > Algonquin, Ill. 
37.00 10.00 13.00 BOO ks Wolf Lake, IIl. 
37.00 10.50 10.50 Bye). Calumet Lake, III. 
Types: Collection Bryant Walker, Detroit, Mich., five specimens, 
No. 146. 
Type Locatity: Rouge River, Wayne County, Mich. 
ANIMAL, JAW, RaApuLa and GENITALIA: Not examined. 
