d, Marginella. 
Foot very large, part- Eyes on the outer base 
ly covers the shell by of the tentacula, 
raising the lobes of the 
mantle ; a retractile 
trunk, a respiratory 
tube above the head; 
no operculum. 
c. Mitra. 
f. Cancellaria. 
6. Buccinum. 
Shells without folds on 
the columella ; with a 
notch or short canal in- 
flected towards the left, 
for the passage of the re- 
spiratory tube. Pl. 410, 
fig. 24. 
a. Buccinum. 
No veil to the head ; 2 Conical tentacula far Eyes on the outer side 
a trunk; a respiratory apart, of the tentacula. 
tube formed by the 
mantle ; operculum 
horny. Pl. 47, fig, 45, 
ae Ps. 13, fies 165419, 
20. 
6. Eburna, Lam. 
c. Dolium, Lam. 
d. Harpa, Lam. 
ce. Nassa, Lam. . 
Ventral disk en- 2 Pointed tentacula. Eyes in the middle part 
larged, truncated an- of the tentacula. 
teriorly, prolonged be- 
yond the head; a tube 
above the head formed 
by the mantle. 
f. Purpura, Brug. (1) 
Foot elliptical; re- Ditto. Eyes in the middle of 
*  spiratory tube prolong- the outer part of the ten- 
ed above the head ; tacula. 
operculum _ cartilagi- 
nous, Pl. 47, fig. 14, 
(1) The animal furnishes a matter fit for dying red, which the ancients used, and 
which is still employed in the north of Europe. 
