LYMNZIDZ OF NORTH AMERICA. 99 
Pee. on, No A. 1, p. 72, 1865— Merk, Wy) .S. Geoll-Surv. Terr, 1X; -p: 
598, pl. 45, fig. 5, 1876—Wuite, Bull. U. S. Geol. & Geog. Surv., Terr., III, p. 
613, 1877; 3rd An. Rep. U. S. Geol. Surv., p. 446, pl. 32, figs. 26-27, 1882. 
Lymnea meekii CocKERELL, Nautilus, XXII, p. 70, 1908. 
“SHELL rather large, conical-subovate; spire less than half the 
length of the shell, acutely pointed at the apex; volutions five and a 
half to six, convex, last one ventricose, and comparatively large; suture 
well defined. Aperture rather narrow-ovate, angular above and 
rounded below; lip slightly dilated at the lower part of the columella ; 
surface marked by moderately distinct lines of growth. 
“Length, 1.15 inches; breadth, 0.66 inch; apical angle nearly reg- 
ular, divergence 54°.” (Meek.) 
Type: Location not ascertained. 
Horizon: White River formation, Oligocene Period. 
LocaLity: Pinot’s Creek, South Dakota. 
Remarks: “This fine Limnea is quite similar to several of the 
species figured by Edwards in his Monograph of the Eocene Mollusca 
of England, published by the Palzontographical Society, but seems to 
present well-defined specific differences from them all.” (Meek. ) 
Meekiana is strongly suggestive of some specimens of the recent 
Galba catascopium Say. It is one of the largest of the fossil Lymnzeas 
(excepting Stearn’s maxima) as well as one of the most characteristic. 
For some reason not apparent to the writer, Dr. White used the specific 
name meekw in his report on the non-marine Mollusca, instead of the 
original name meckiana. There seems to be no warrant for changing 
the name, other than that of classical purity, which, as remarked before, 
cannot be taken into account in systematic nomenclature, where sta- 
bility is of the first importance. 
Galba shumardi (Meek). Plate XVI, figures 26, 27. 
Limnea shumardi Merx, U. S. Geol. Surv. Terr., IX, p. 599, pl. 45, fig. 6, 
1876. —WhuiteE, Bull. U. S. Geol. & Geog. Surv. Terr., III, p. 613, 1877.—MILLEr, 
Journ. Cin. Soc. Nat. H., IV, p. 111, 1881; Mes. & Cznoz. Geol., p. 253, 1881.— 
Wauim 3rd An. Rep. U. S. Geol. Surv., p. 446, pl. 32, figs. 28-29, 1883.— 
Marcou, Proc. U. S. Nat. Mus., VIII, p. 340, 1885——Scuucuert, Bull. U. S. 
Mus., 53, i, p. 356, 1905. 
Lymnea shumardi CocKerett, Nautilus, XXII, p. 70, 1908. 
“SHELL rhombic-subovate ; spire less than half the entire length, 
very acute at the apex; volutions five and a half, convex, last one not 
ventricose, rather oblique; suture moderately well defined; surface 
marked by distinct lines of growth, and sometimes having, on the upper 
part of the body-whorl, a few broad, obscure, vertical or oblique folds; 
aperture ovate, rounded below, and angular above. 
