64 
•* 
ANCYLUS elegans. 
TAB. DXXXIII. 
Spec. Char. Convex,, subconical ; aperture longi- 
tudinally obovate ; apex oblique, eccentric, 
near the narrowest part of the aperture. 
The aperture is exactly intermediate in form between 
that of the two recent species. Considering the aper- 
ture as the base, it is narrowest towards the back : the 
apex is far from central, and is bent down towards one 
side. With a high power, minute striae are seen de- 
scending from the apex ; the height is nearly equal to 
half the greatest diameter of the aperture. 
Found along with Mya subangulata (probably only a 
young state of M. plana), Melanopsis brevis, tab. 523 , 
and Paludina lenta, tab. 31, in a dark gray Sand imme- 
diately under the white Sand at Hordwell, in which My- 
tilus Brardii occurs. We are indebted to the generosity 
of Charles Lyell, Esq., jun. for the specimens ; no one 
else appears to have found it. 
