UNIVALVES —_ BUCCINUM. 1138 
BUCCINUM. — Whe x. 
DESCRIPTION OF PLATE XXIV. 
Dry. I. — Fam. 1. Fig. 3. B. dolium. 
Diy. [V.—Fam. 2. Fig. 1. B, decussatum. 
Div. V.—Fam. 2. Fig. 2. B. papillosum. 
Di. VI.—Fam. 1. Fig. 5. B. pullus. 
Drv. VII. —Fig. 7. B. harpa. 
Dw. VIII.—Fam. 1. Fig. 6. B. monodon. 
Dw. XIII.—Fig. 4. B. spiratum. 
Dr. XVI.—Fam. 1. Fig. 8. B. maculatum. 
Shell univalve, spiral, gibbous; aperture ovate, terminating in a 
short canal, leaning to the right, with aretuse beak or projection ; 
pillar-lip expanded. 
THIS genus is rendered difficult to separate from the 
Murex, by a striking similarity of form in some of its 
species. The leading distinction of the Buccinum is 
its beak or canal, whichis usually much shorter than that 
of the Murex, and also inclines to the right: the shape 
of the former being more gibbous, constitutes another 
distinctive character. 
Of the numerous divisions of this genus, the 
first is composed of those shells which are commonly 
known by the name of Tuns; they have a brittle and 
light structure, and although some of them grow toa 
large size, they retain their characteristic fragility and 
thinness; their form is almost invariably globose. 
_ The B. dolium, B. olearium, and B. galea, are the most 
common species; the latter of which sometimes exceeds 
ten inches in diameter. 
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