LYMN#IDA OF NORTH AMERICA. 259 
known from modicella by the greater obesity of the body whorl, which 
produces a more acutely conic spire. 
Say’s types are like the two specimens figured on plate XXIX. 
The species is not well figured by either Binney or Haldeman, the 
former not showing well the obese character of the body whorl, while 
the latter does not well illustrate the conic, turreted spire. The figures 
on the plate, from specimens in the collection of Mr. Bryant Walker, 
show well the rotund whorls. Mr. William G. Mazyck, of Charleston, 
South Carolina, sent several specimens to the writer, which are figured 
on plate XXX. The New Jersey record is somewhat of a surprise; 
the specimens, however, are quite typical. Humilis has been made to 
embrace almost all of the small forms of the Lymnzas in the United 
States, as many as eight species being included under this all-embracing 
name. As species go in Lymnza, these are well characterized and 
easily known when attention is given to the details of structure. 
Galba humilis modicella (Say). Plate XXIX, figures 31-37; 
plate XXXI, figures 1-9. 
Lymneus modicellus Say, Journ. Phil. Acad., V, p. 122, 1825; Binney’s Ed., 
p. 113, 1858. 
Lymnea modicella GouLtp, Lamarck’s Genera, p. 69, 1833—WHEATLEY, 
Cat. Sh. U. S., p. 23, 1843 —Scupper, Bull. Nat. Mus., 23, p. 201, 1885 WALKER, 
Ottawa Nat., XXII, p. 91, 1908. 
Lymnea modicellus Linstey, Amer. Journ. Sci., XLVIII, p. 283, 1845. 
Lymnea humilis var. modicella, JAy, Cat., p. 269, 1852. 
Lymnea humilis modicelle Berry, Nautilus, XXIV, p. 62, 1910. 
Lymnea modicellus DEKay, An. N. Y., p. 32, 1839.—GrrRaArD, Proc. Nat. Inst., 
I, No. 2, p. 81, 1856—Currier, Sh. Grand River, Mich., 1859. 
_ Limnea modicellus Hatpv., Mon. Lim., p. 42, pl. 13, figs. 2-8, 1842—TRUuE, 
Proc. Essex Inst., IJ, p. 195, 1857.—Turts, Cat. Sh. Mass., p. 87, 1859——MILEs, 
Geol. Surv. Mich., 1860, p. 237. 
Limnea modicellus Gou.p, Invert. Mass., p. 218, fig. 151, 1841—Prescorr, 
Cat. Sh. Mass., No. 197, 1842—ReEap, Cat., 1843.—RuSSELL, Journ. Essex Co. 
Nat. Hist. Soc., p. 130, 1852.—Currirer, Kent. Sci. Inst., Mis. Pub., No. 1, 1868. 
Limne@a modicella Bett, Geol. Surv. Can. Rep. Prog., p. 252, 1859.—Brn- 
NEy, Land and F. W. Sh. N. A., II, p. 64, fig. 100, 1865—-Tryon, Amer. Journ. 
Conch., III, p. 196, 1867—Sows., Conch. Icon., XVIII, sp. 83, pl. 12, fig. 83, 
1872.—C.essin, Mal. Blatt., n. s., III, p. 81, 1881—Jorpan, Nova Acta Ksl.-Leop. 
Carol. Deutsch Akad. Natur., XLV, p. 367, 1883—CKLL., Journ. Conch., VI, p. 
61, 1889.—SincLry, An. Rep. Geol: Surv. Texas, IV, p: 188, 1892; p. 313, 1893. 
Lymnea desidiosa var. modicella BAKER, Nautilus, XVIII, p. 127, 1905.— 
LERMOND, Shells of Maine, p. 38, 1908. 
Lymne@a desidiosa modicella STERKI, Proc. Ohio State Acad. Sci., IV, p. 
382, 1907. 
