123 
Yar. a. Shell white^ with two revolving reddish-brown dilated 
lines. 
Length three-twentieths of an inch. Inhabits the coast of 
the Southern States. Cabinet of the Academy and Philadelphia 
Museum. 
Animal pale, whitish ; foot linear, nearly as long as the shell, 
acute behind, hardly larger than the respiratory trunk, truncate 
before ; trunk more than half as long as the shell, obtuse at tip, 
with a brown undulation near the tip, and another near the base 
tentacula short, cylindrical, annulate with blackish on the middle ; 
eyes black, placed on the base of the tentacula. 
* 
Found adhering under stones, fuci, &c., in the bays ) numerous. 
It varies in color and in markings ) the white sometimes predomi- 
nates, and reduces the reddish-brown to one or two linear, trans- 
verse, undulated lines. A variety occurs on the coast of Maiyland, 
which is white, with two or three reddish-brown, irregular-revolv- 
ing lines. 
Fusus 10-cosTATUS. — Shell somewhat ventricose, very short, 
fusiform ; the beak being much shorter than the spire ; with six 
or seven volutions, which are each obliquely flattened above the 
shoulder, and spirally ribbed 3 these costae are elevated, semicylin- 
dric, and, with the exception of the two superior ones, equidistant • 
sutural costae remote from that of the shoulder ; interstitial spaces 
with small lines parallel to the costae ; the latter are ten in number 
on the body whorl, three on the second whorl, three on the third, 
and obsolete on the fourth. 
Length three and three-tenths inches. Greatest width one and 
nine-tenth inches. Length of the spire one and two-fifth inches. 
This interesting species was presented to me by Mr. Zaccheus 
Collins, who obtained it from the coast near Boston. The summit 
of the spire, of two specimens before me, is partially removed, ex- 
hibiting in the interior a close arrangement of very numerous 
septae, formed by the animal at different times, as it increased in 
size, and gradually abandoned the apex. It approaches very closely 
in character to the genus Buccinum. 
Fusus BICOLOR. — Shell short, fusiform ] the beak subequal to 
the length of the spire ; volutions five, convex, with abrupt, promi- 
nent, regular, equidistant undulations, which, on the body whorl, 
