oo SHELLS OF NEW ENGLAND. 
M. nexicina, Moll. Lovén. Turbo helicinus, O. Fabr. 
Margarita arctica, Gould, 255, f.173*. Trochus heli- 
cinus, F. et H.— Litt. Lamin. From Cape Cod 
northward. 
M. coarctata, St. Delphinula coarctata, Mighels, Bost. 
Jour., iv. 349.— Casco Bay. An examination of the 
animal is necessary to determine the position of this 
species. 
Dekay has described two species of Margarita from 
the vicinity of New York, — M. multilineata and M. 
ornata. His descriptions and figures do not enable 
me to determine them. 
ADEORBIS cosTULATA, St., Bost. Proc., iv. 14. Marga- 
rita ? costulata, MOll., 1842. ? costulata, F. et H. 
Marg. minutissima, Mighels, 1843. (?) — Corall. Off 
Grand Manan in 30 f. (W. 8.) to Mass. Bay. 
PuastaNELLA suLcosa, Migh., Bost. Jour., iv. 548,— 
Maine. It will be impossible to determine the true 
place of this shell without an examination of the an- 
imal, until which I leave it where Dr. Mighels has 
placed it. 
IAN THINIDA. 
lanruina FRaGiLis, Brug. Gould, 240. — Occasionally 
east ashore at Nantucket. 
PALUDINID. 
Me.antia Depyets, Say. Adams, in Thompson's Hist. 
Vermont. — Lake Champlain. 
