SHELL 
Kosteliaria. Lattiarck has fotmcd this 
genus on Strombus fusus, (Linnaeus) and on 
some fossil species found at Couitagnon. 
The characters of the genus are : a fusiform 
shell, terminating interiorly by a canal with 
a pointed beakj tlie right edge entire or 
dentated ; dilated more or less in a wing, 
according to age, and having a sinus conti- 
guous to the canal. 
Strombus. A bellied univalve, terminat- 
ing, at its base, by a canal, accompanied 
with a distinct sinus ; the right lip dilating, 
or spreading itself out, with age, in a simple 
or digitated lobe. Lamarck divides the genus 
Strombus of Linnaeus into three, t. Strom- 
bus; terminating in a short canal, truncated 
or grooved out ; the right edge dilating, with 
age, into a simple entire wing or lobe ; with 
a sinus distinct from the groove at the base, 
as in S. pugilis. 2 . Pterocera ; a bellied 
shell, terminated inferiorly by an elongat- 
ed canal ; the right edge dilating, with age, 
in a digitated wing, and having a sinus near 
its base, as in S. Iambus. 3. Rostellaria, 
the genus last described, 
Buccinum. An oblong or oval shell, the 
opening of which is terminated at the base 
by an oblique groove, without any sensible 
canal, or external border. Bruguiere has 
divided the Buccina of Linnaeus into the 
genera Buccinum, Terebra, Cassidaea, and 
Purpura. Under the gemis Buccinum are 
therefore here comprised tumid shells, with 
from three to ten spiral turns; a summit 
generally flattish; a surface rarely even; 
the predominating colours dull; the lip ex- 
tended more or less in a bow, and rarely 
jagged. 
Cassidtea. A tumid shell, the opening 
longer than wide, terminated at its base by 
a short canal, recurved towards the back 
of the shell ; the columella plaited in the 
lower part. This genus of Bruguiere is in- 
tended to comprise the helmets (casques) of 
Gualteri, Klein, and others. '' 
Terebra. A turriculated’ univalve ; the 
opening grooved in the lower part ; the base 
of the columella twisted or oblique. 
Purpura. An oval shell, generally with 
spines, or tuberculated ; the opening termi- 
nating in a very short canal, the extremity 
of the canal grooved out, the base of the co- 
lumella finishing in a poinf. The shells in- 
cluded in this genus by Bruguiere, are not 
those species which have been hitherto 
considered, as Purpurae, by Dargenville and 
others, and which belong to the genus Murex ; 
but those species which appear to connect 
the genus Buccinum and Murex, The open- 
VOL, VI, 
ing of these shells is rather large, oval, 
round, upwards, and more contracted in 
the inferior part ; the right lip has but lit- 
tle thickness, and is grooved or notched ; 
the left expands witli a wrinkled ridge, 
which terminates in the groove. 
Voluta. A cylindrical, or oval, univalve 
shell, grooved out at the base, but without 
a gutter ; the opening longer than wide ; 
and the columella plaited. The division of 
this genus by Linnaeus is very clear and use- 
ful ; but Lamarck proposes a still nicer dis- 
tinction of the shells of this genus, by di- 
viding them into eight genera. 1. Voluta, 
an oval shell, more of less bellied, summit 
obtuse or mammillated ; the base grooved, 
but without a gutter ; the columella with 
several plaits, of which the lowest are 
largest and longest; as in Voluta musica. 
2. Oliva, sub-cylindrical, grooved at the 
base ; the turns of the spire separated by a 
channel ; the columella striated obliquely, 
as in Voluta oliva. 3. Ancilla, oblong, a 
short spire, base of the' opening hardly 
grooved ; a swelling, or oblique roll, at 
the base of the columella, 4. Mitra, fusi- 
form or turriculated, spire pointed at the 
summit, the base grooved out, vVithont a 
gutter; the columella with plaits, the low- 
est being die least, as in Voluta episcopalis. 
5. Columbella,’ marked by a swelling on 
the internal face of the right edge ; as in Vo- 
luta mercatoria. 6. Marginella, the right 
edge emarginated, as in Voluta vespertilio, 
7. Cancellaria, the right edge grooved in- 
ternally, and the base of the opening al- 
most entire, as in Voluta reticidata. 8. Tur- 
binella, sub-turbinated, canaliculated at its 
base,with transverse plaits on the columella. 
Ovula. A tumid shell, more or less elon- 
gated at the extremities ; the edges rolled 
inwards ; the opening longitudinal, not den- 
tated on the left side. This genus is form- 
ed by Lamarck from shells, which had been 
comprised by Linnmus in his genus Bulla. 
The shells of the genus Ovula differ from 
those of Cypraea, chiefly by the absence of 
teeth from the left-side. Bulla volva, ovum, 
spelta, verrucosa, and gibbosa, of Linnasus, 
are placed under this genus. 
Terebellum, a shell nearly cylindrical^ 
pointed at the summit ; the opening longi- 
tudinal, narrow upwards, and hollowed out 
at its base ; the columella truncated. This 
genus is formed by Lamarck, of the Bulla 
terebelum of Linnaeus, which he has re- 
moved from the genus Bulla, and has placed 
in this genus, as intermediate between tlse 
Ovulae and the Olives. 
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