158 Mr. A. Adams on new Species of Mollusca 
margine regulariter arcuato, postice producto et acute angu- 
lato. 
Hab. Tsu-Sima; 26 fathoms. 
This is a slightly convolute, thin, oblong species, with the 
transverse lines waved but not punctate, and the aperture 
greatly dilated. 
Genus Atys, Montfort. 
This genus is one of the many good ones established by 
Denys de Montfort, who also gave us Scaphander, Trophon, 
Phos, and Typhis, and who did his best to illustrate his work 
by engravings of his own, which are certainly rude and not 
always accurate. For the better understanding of the genus, I 
have thrown my Japanese and Chinese species into subordinate 
but, I think, convenient groups. 
Subgenus Arys, Montfort. 
Testa ventricosa, transversim striata. 
1. Atys amphorella, A. Adams. 
A, testa ovoidea, ventricosa, in medio gibbosula, rimata, tenui, leevi, 
nitida, luteola, antice angusta, postice subacuminata; labio sub- 
recto, antice v'x truncato; labro arcuato, postice producto, tor- 
tuoso, rotundato. 
Hab. Lo-shan-kow ; Shan-tung. 
Atys tortuosa, A. Adams, is the nearest approach to this spe- 
cies, which, however, is not striated, and the outer lip has not the 
spiral twist so conspicuous in that species. My Chinese species 
is shaped like a little fat Amphora. 
2. Atys scrobiculata, A. Adams. 
A. testa ovoidea, ventricosa, postice angustata, antice acuminata, 
sordide alba, late et profunde umbilicata; umbilici margine angu- 
lato ; apertura utrinque valde producta; margine columellari recto, 
simplici, antice rotundato. 
Hab. Tabu-Sima; 25 fathoms. 
The only shell which resembles this singular little species is 
A. tortuosa, A. Adams; but the great peculiarity of the aperture, 
which is pointed at both ends and produced beyond the body- 
whorl, distinguishes it from all others. 
Subgenus Roxan1a, Leach. 
Testa solida, ovoidea, transversim lineato-punctata. 
3. Roxania punctulata, A. Adams. 
R., testa ovoidea, solida, perforata, utrinque rotundata, decussatim 
