LYMNZIDZ OF NORTH AMERICA. 250 
found in the cabinets of western conchologists reposing under the name 
of Lymnea humilis. 
Galba humilis (Say). Plate XXIX, figures 26-30; plate XXX, 
figures 19-20. 
Lymneus humilis Say, Journ. Phil. Acad., II, p. 378, 1822; Binney, Re- 
print, p. 110, 1858. 
Lymnea humilis Goutp, Lamarck’s Genera, p. 69, 1833.—Jay, Cat., Ed. 1V, 
p. 269, 1852—Reerve, Elements of Conch., p. 179, 1860—Datt, Alaska Moll. 
p. 73, fig. 50, 1905 (part)—HeEnverson, Univ. Colo. Studies, IV, fig. 33, 1907. 
Limnea humilis Brnney, Check List, p. 12, 1860; Land & F.-W. Sh. N. A., 
II, p. 63, fig. 99, 1865——GouLp, Invert. Mass., Binney’s ed., fig. 151, 1870.—Sows., 
Conch. Icon., XVIII, Limn., sp. 78, pl. 12, figs. 70, a, b, 1872 (the figures are 
scarcely characteristic) —Tryon, Con. Hald. Mon., p. 105 (79), 1872 (part).— 
Ciessin, Mal. Blatt., n. s., I, p. 27, 1879 (part) ; III, p. 81, 1881 (part). 
Limnea humilis Hatp., Mon. Limn., p. 41, pl. 13, fig. 1, 1842—DeKay, 
Zool. N. Y., p. 71, 1843 (part). 
Limnophysa humilis Breck, Index, p. 112, 1837—-Tryon, Amer. Journ. 
Conch., I, p. 256, 1865 (part)—HartMan and MicHENER, Conch. Cestrica, fig. 
126, 1874—CaLL, An. Rep. Dept. Geol. Nat. Res. Ind., XXIV, pl. 8, fig. 9, 1899. 
Limneus humilis Gipss, App. Geol. So. Car., p. XX, 1848.—KUsTeEr, Conch., 
Cab., p. 51, taf. 11, figs. 15, 16, 17, 18, 1862 (figures are not typical). 
SHELL: Small, ovate-conic; periostracum light yellowish horn; 
surface shining, sometimes polished; lines of growth crowded, promi- 
nent ; spiral sculpture absent or but slightly indicated ; apex as in Galba 
humilis modicella; whorls 5-5%, convex, rather rapidly increasing in 
diameter, the body whorl quite obese; spire conic, turreted, about as 
long as the aperture; sutures well impressed ; aperture ovate or roundly 
ovate; peristome lip thin; inner lip reflected to form a narrow, some- 
what triangular expansion which may be rolled in toward the umbilical 
chink or stand more or less erect; umbilical chink small and narrow, 
emarginated by the inner lip; parietal callus well marked ; axis smooth, 
forming a column as in Galba cubensis. 
Length. Breadth. Aperture length. Breadth. 
8.50 4.50 4.50 2.50 mill. Say’s type. 
8.50 5.00 Sroraue S5cate Pe ts a 
6.00 3.50 Petes 2.00 “ Charleston, S. C. 
6.00 3.75 3.00 2.00 “ cf i: 
8.00 4.75 4.50 o 50 “ (Walker Coll.) 
8.00 4.50 4.00 2:35 ; oi 
Types: Academy of Natural Sciences, Philadelphia, two speci- 
mens, No. 58754. 
Tyre Locarity: South Carolina. 
ANIMAL, JAw, Raputa and GENITALIA: Not examined. 
RANGE (Figure 24): Southeastern United States. So far as at 
present known, humilis is confined to the Upper and Lower Austral 
