414, Mr. A. Adams on new Mollusca from Japan. 
the columella. In size it was equal to Bithynia ventricosa. 
Pieces of drift-wood, vegetating seeds, shells of Spirula, a small 
Litiopa, Hyalee, Loligopsis, and one of the venomous sea-snakes 
of the Bay, with a keeled belly, black above and yellow below, 
and with a broad white zigzag line running along the laterally 
compressed tail, entered our towing nets on that night, borne 
by the tidal currents through the group of islands. 
Morch rejects Jeffreys’s Recluzia aperta from the genus, and 
refers it to Amauropsis. The aspect of the shell is opposed to 
the supposition of its being a floating pelagian form. 
Cheltenham, Oct. 19, 1860. 
LIT.—On a new Genus and some new Species of Mollusca from 
Japan. By Artuur Apams, F.L.S., &c. 
Genus Cineurina, A. Adams. 
Testa subulato-turrita. Anfractus numerosi, cingulis elevatis spiralibus 
instructi, interstitiis sculptis. Apertura oblonga, antice integra ; 
labio recto, simplici; labro acuto, arcuato. 
This genus most nearly resembles Monoptygma in form and 
sculpture ; but in the straight inner lip and absence of parietal 
fold it is like Turbonilla. The transverse ridges of the whorls 
likewise suggest Aclis, but the form of the aperture is very dif- 
ferent. Ihave found the typical species (described below) both 
in the north of China and in the Sea of Japan. 
Cingulina circinata, A, Adams. 
C. testa subulato-turrita tenui, alba, opaca; anfractibus normalibus 
circa 11, planiusculis, cingulis spiralibus tribus, interstitiis longitu- 
dinaliter concinne striatis; anfractu ultimo cingulis quatuor in- 
structo, basi convexo, liris spiralibus elevatis ornato. 
Hab. Awa-Sima; in shell-sand. Loo-shan-Kou (Shan-tung) ; 
in shell-sand. 
Genus Partuenta, Lowe. 
Since writing my papers containing descriptions of new spe- 
cies of Parthenia, Odostomia, Dunkeria, &c., I have continued 
to investigate these interesting though somewhat diminutive 
forms, and am now enabled 'to record several additional species. 
1. Parthenia spirata, A. Adams. 
P. testa ovato-conica, tenui, sordide alba, rimata; anfractibus nor- 
malibus 4, spiratis, longitudinaliter costatis, costis rectis subdi- 
stantibus, interstitiis lirulis obsolete decussatis, suturis canalicu- 
latis, costis in anfractu ultimo (basi liris convergentibus ornato) 
