OF NORTH AMERICA. 343 



Length. Width. Aperture length. Width. 



27.00 11.00 14.00 7.25 mill. Type 



27.00 11.50 15.00 7.50 " 



TYPES: Collection Bryant Walker, two specimens, No. 14037. 



TYPE LOCALITY: Lake Albert Lea, Minn. 



ANIMAL, JAW, RADULA and GENITALIA: Unknown. 



RANGE: Minnesota. A race of the Transition life zone (humid 

 division) and of the Upper Mississippian region. It has probably been 

 called either reflexa or palustris by most collectors and its range may 

 be widely extended when its characteristics are once known. 



RECORDS. 



MINNESOTA: Lake Albert Lea, Freeborn Co. (H-emphill; Walker). 



GEOLOGICAL DISTRIBUTION : Unknown. 



ECOLOGY : Not recorded. 



REMARKS : Hemphilliana is suggestive of a widened out and short- 

 ened up Galba exilis. The spire is flat-sided as in exilis, but the shell 

 is wider and the aperture more expanded, as in reflexa. As far as 

 known, it has been found only in Minnesota. Its chief characteristics 

 are its short, wide, flat-sided spire and wide whorls. It somewhat 

 resembles Galba lance'ata Gould, but is wider with more flat-sided 

 whorls and a longer, narrower and more oblique aperture. A good 

 series of this race is a desideratum. 



Galba exilis (Lea). Plate XXXV, figure 4; plate XXXVI, 

 figures 21-22 ; plate XXXVII, figures 1-11. 



Lymncea exilis LEA, Trans. Amer. Phil. Soc., V, p. 114, pi. 19, fig. 82, 1837 ; 

 Obs., 1, p. 226, pi. 19, fig. 82, 1837. WHEATLEY, Cat. Sh. U. S., p. 23, 1845. SCUD- 

 DER, Bull. Nat. Mus., 23, pp. 14, 201, 1885. 



Lymnea exilis ANTHONY, L. & F.-W. Sh. Cin., 1848. SHAFFER, Shells Cin. 

 Ohio (no date). 



Lymneus exilis KIRTLAND, Zool. Ohio, p. 174, 1838. 



Limnceus exilis KUSTER, Conch. Cab., p. 40, taf. 7, fig. 9, 1862. 



Limn&a exilis BINNEY, L. & F.-W. Sh. N. A., II, p. 40, fig. 50, 1865. SOWB., 

 Condi. Icon., XVIII, Lim., sp. 72, pi. 11, fig. 72, 1872. HAZAY, Mai. Blatt., ii, 

 III, pp. 17, 164, 1881. JORDAN, Nova Acta Ksl.-Leop.-Carol. Deutsch. Akad. 

 Natur., XLV, p. 368, 1883. 



Lymn&a reflexa var. exilis JAY, Cat., p. 270, 1852. 



Limn&a reflexa var. exilis WALKER, Journ. Conch., II, p. 330, 1879. 



Limnaa reflexa yar. exilis WALKER, Nautilus, VI, p. 32, 1892; Rev. Moll. 

 Mich., p. 17, 1894. BAKER, Moll. Chi. Area, II, p. 282, pi. 31, fig. 3 ; pi. 32, fig. 3, 

 1902. 



Lymncea reflexa exilis BAKER, Bull. 111. State Lab. N. H., VII, p. 105, 1906. 



Limnophysa reflexa attenuata BAKER (non Say), Journ. Cin. Soc. N. H., 

 XIX, p. 84, 1897. 



Limncea reflexa SOWB., Reeve, Conch. Icon., pi. 5, sp. 32, b. 1872. BAKER, 

 Trans. Acad. Sci. St. Louis, XT, p. 17, pi. I, fig. 3, 1901. 



