CANCELLARIA, TRACHELIPODA. 43 
Fusus longevus. Plate I. fig. 7. Found in the Lon- 
don Clay at Barton Cliff, &c. 
This genus may be properly arranged in the following sections :— 
Section 1.— Spire and canal of equal length; aperture elliptical ; body 
ventricose ; base of the aperture suddenly contracted into a straitened canal ; 
as in F. Colus. 
Section 2. — Subpyriform ; spire short; body tuberculate, and ventricose 
above, sometimes with vaulled spines, encompassing the volutions, and the 
aperture ending in a short spire ; as in F. Colosseus. 
Section 3.— Bucciniform ; with spire longer than the canal, which is short, 
and somewhat oblique ; shell most ventricose below the centre of the body ; as in 
F, Lignarius. 
Section 4.— Fusiform ; columella with two or three transverse folds, imme- 
diately above the commencement of the canal; as in F. Infundibutum, (the 
Turbinella Infundibalum of Lamarck.) 
The shells of this genus are numerous, and inhabit the seas of almost all 
countries. 
Fossil Fusi are numerous, and occur in the London Clay, the Calcaire- 
grossier ; and the English Crag ; Blue Marls of France ; the Super Cretaceous 
rocks of Bordeaux, and Dax, also in the Cretaceous group of rocks. 
Genus XXXIV. — FASCIOLARIA. — Lamarck. 
Generic Character. — Shell elongated, fusiform; the spire 
generally of equal length with the canal; aperture oblong- 
ovate, generally acuminate both above and below, ending 
in a nearly straight canal, provided with three oblique plaits 
at the base of the columella, the lower one generally largest ; 
operculum horny, thick, oval, and acuminated below. 
Fasciolaria Turbinelloides. Plate V. fig. 34. 
In their general form, the shells of this genus much resemble those of 
Fusus, but their want of the oblique folds, so conspicuously marked in 
Fasciolaria, at once render the difference obvious. They are distinguished 
from Turbinella by the great obliquity of the plice, and in the lower one 
being always largest. 
The species are not numerous, and are principally inhabitants of the East 
and West Indian Seas. 
The Fossil species are few, and occur chiefly in the new formations, namely, 
the Super Cretaceous rocks of Bordeaux, and Dax. 
Genus XXXV.— CANCELLARIA. — Lamarck. 
Generic Character. — Shell oval, thick, subturreted ; 
spire short in most species, but produced in a few; body 
large, ventricose, greatly exceeding the spire in length; 
aperture subovate, not quite entire, the base being, for the 
most part, somewhat extended into a canal, distinct in most 
cases, but always short and recurved; outer lip transversely 
sulcated within ; inner lip reflected over the columella, and 
