374 Miscellanies. 
whorls of the spire. The entire want of granulations distinguishes 
it from the common type of the species. It is distinguished from the 
Murex es Mont., by the same character. 
2 ANORBIS VIRENS. P. testa parva, viridi, striis transversis 
crebris paar rico tenuissimis ; anfractibus quatuor; spira haud 
prominente; vix concav&; anfractu ultimo superne sub-planulato; 
inferne sub-carinato; labro superne prominente; umbilico subulato 
profundo. Habitat New Bedford. 
Remarks.—-This species differs from P. parvus, Say, in being much 
less broadly and more deeply umbilicate beneath ; it is also higher. 
P. parvus instead of being subcarinate on the lower side is much flat- 
tened. P. concavus, Anthony MSS., resembles this species, but is 
more convex above and concave beneath. 
3. Limnea acumrinaTA. L. testa fragili, semitransparente, ovata, 
striis transversis irregularibus revolventibus creberrimis parallelis; 
anfractibus quatuor; spiré perbrevi, subacuté; anfractu ultimo max- 
imo; apertura amplissima, spire interiorem ostendente; columella 
tenui subreflexa; labio haud appresso. Habitat New Bedford. 
Remarks.—This differs from the L. columella, Say, in the much 
greater proportional size of the Jast whorl, the breadth of the shell 
and the presence of very distinct revolving lines. It resembles the 
Succinea obliqua, Say, but the spire is rather less, and no revolving 
lines are mentioned in the description of that species. The L. acumi- 
nata has also been found at Horn pond, in Woburn, Mass., by T. J. 
Whittemore, Esq. 
IMNEA UMBILICATA. L. testa ae ovata, striis transversis 
: yevelWentibos tenuibus; anfractibus quinque convexis ; sutura perim- 
pressa; spird subaeuta; anfractu ultimo subgloboso; apertura ovata 
dimidio longiore quam spirAd; labro intus fusco marginato, punicea 
albo submarginato ; columella late reflecta, es plicata ; umbili- 
co subamplo ead profundo. Habitat New Be 
Remarks.—For this and the second species joao above, Prof. 
Adams is indebted to Mr. Shiverick. The L. umbilicata resembles 
L. caperatus of Say, but in the latter the aperture is about one half 
the length; revolving lines are raised, more distinct and numerous 5 
umbilicus is rather less, and there is one more 
5. Limnea patuipa. L. testa ovatd fusiformi pallida; anfracti- 
bus quinque; sutura impressa, spira conica subacuta; anfractu pos- 
tremo producto; apertura superne acuta, haud magna; umbilico par- 
vo. Habitat Shoreham, Vt., on shores of Lake Champlain, clinging 
sks and stones. 
:.— This species most sebesiibfen L. acuta, Lea; it differs 
long, shanna and of a » pale brown sat) like the 
