po Species of Massachusetts DM 981 
and upper half of the body whorl, rugose Eo citudinaile 
with three impressed revolving lines, presenting a de- — 
aie or granulous appearance ; upon the lower half 
1e sof which. runs around at the inferior abrupt si 
ài ion of f ha tug cha are eighteen to twenty $ d 
the shell ; ide not thickened, ed 
volving iie which are distinctly seen upon the inner 
side; inferior margin effuse ; waite with a x Mm 
sub-oblique fold, arcuate, reflexed 5. 
Length, 15 inch ; breadth, 
Uh 
only, which are "ig that I have seen. -'They were found 
in Dartmouth, at the village of Ponygansett, four miles 
southwest from New Bedford. They were WE, in 
feet, perpendicular depth, below low water mark, upon 
single valves of the Pecten concéntricus, Say, in com- 
pany with the Nassa lundta, Say, Columbélla avàra, 
Say, and the Nùcula margaritácea, Lam. The valves 
of the Pecten, on which they were found, were taken 
from the bottom by my hands at a venture, when 
bathing. A dredge would probably reveal more. 
This species probably belongs to Brown's genus ~~ 
Jaminia, which is nearly allied to his Pyramis, butas — 
descriptions of these genera are not accessible, it is with — ^. 
some doubt that 1 have referred it to Jaminia, lt un- 
doubtedly eines to ne genus with the ae" he 
E. " D 
