NEW FRESH WATER AND LAND SHELLS. 9 
Lymnaa NUTTALLIANA. 
Testd ovato-conicd, subtenui, striatd, subdiaphand, pallido-fuscd, imperforatd; spird breviusculd; apice rufa; sutu- 
ris impressis; anfractibus senis, convewis; aperturd ovata, inflatd, intus fasciata. 
Shell ovately conical, rather thin, striate, subdiaphanous, pale brown, imperforate ; spire rather short; apex red; su- 
tures impressed; whorls six, convex; aperture ovate, inflated, banded within. 
Hab. Oregon. Prof. Nuttall. My Cabinet and Cabinets of Prof. Nuttall, and Dr. Jay. Diam. .50, 
Length .95 of an inch. 
Remarks.—A fine, rather robust species, resembling L. elodes, (Say,) but shorter and more 
inflated and having a larger and more curved fold. The aperture is rather more than one- 
half the length of the shell, and is retuse at the lower part. Under the lens may be ob- 
served very minute revolving striw. ‘The band within the aperture is removed from the 
edge of the lip, and is broad and brown. The lip is not reflexed. 
LYMN#ZA BULIMOIDES. 
Testd ovato-conicd, subtenui, levi, nitidd, diaphand, fusco-luted, minute perforata; spird breviusculd; suturis par- 
vis; anfractibus quinis, subconvexis; aperturd ovata. 
Shell ovately conical, rather thin, smooth, shining, diaphanous, brownish yellow, slightly perforate; spire rather short; 
sutures small; whorls five, slightly convex; aperture ovate. 
Hab. Oregon, Prof. Nuttall, My Cabinet, and Cabinet of Prof. Nuttall. Diam. .22, Length .38 
of an inch, 
Remarks.—Among the shells taken by Prof. Nuttall during his journey over the Rocky 
Mountains, was this small species, the aperture of which is formed very much like a Bu- 
himus. 'The deposite of the columella is wide, and nearly covers the perforation, which 
consequently is very small. ‘The aperture is more than half the length of the shell, and 
the fold obsolete. Several of the specimens, although the substance of the shell is thin, 
have the apex eroded, some of the superior whorls being entirely gone. I have not ob- 
served this to be the case in any other Lymnea. 
LYMN@A EXIGUA. 
Testa subfusiformi, tenui, striatd, subdiaphand, pallido-luted, perforata; spird breviusculd; suturis impressis ; an- 
Sractibus quinis, subconvexis; aperturd ellipticd. 
Shell subfusiform, thin, striated, subdiaphanous, pale yellow, perforate; spire rather short; sutures impressed; whorls 
five, rather convex; aperture elliptical. 
Hab. Tennessee. Dr. Troost. My Cabinet and Cabinet of Dr. Troost. Diam. .15, Length .35 of 
an inch, 
Remarks.—This is a small species about the size of ZL. plica, herein described, and in 
outline resembling it. It differs, however, altogether in the columella, which is nearly 
straight, and the folds scarcely observable. ‘The aperture is about one-half the length of 
the shell, and contracted at the lower part. 
LYMN&A PLANULATA. 
Testd ovato-conicd, tenui, levi, subdiaphand, fuscd, perforata; spird breviusculd; suturis impressis; anfractibus 
quinis, convexis; aperturd parvd, ovatd, 
Shell ovately conical, thin, smooth, subdiaphanous, brown, perforate; spire rather short; sutures impressed; whorls five, 
convex; aperture small, ovate, 
Hab. White Sulphur Springs, Virginia. P, H. Nicklin, My Cabinet and Cabinet of P, H. Nicklin, 
Diam. .15, Length .35 of an inch, 
VOL. 1X.—6 
