fT
:i i f ’
h N iC ,
‘i i khiiri:;
128
a nd strongly plaited, the la st angular, and the middle strongly plaited, like the up p e r whorl behind, and plain
in front, the pla it ending in a p rominent tubercle.
In h ab . Icy Cape.
The specimen is n ot complete, b u t it wil! prove a very distinct species.
B u c c in um p o l a e is .
Shell ovate, conical, rather ventricose, thin, w h ite ; whorls ventricose, closely transversely plaited, and
de eply and closely spirally striated, the u p p e r one with a subposterior, and the la s t with three o r more elevated
keels. Mouth ovate, inne r lip much ab so rb ed ; canal only slightly recurved.
In h ab . Ic y Cape.
T h is shell is very like B . glaHale in form, b u t the whorls are deeply striated and closely plaited. The
shells o f this kind ap p e a r to be formed o f two coa ts,'an opake dead white external one, and a hard pellucid
white inne r o n e ; th e oute r one is often eroded, from the apex o f th e Po la r species leaving the un d e r one
exposed, which being smooth, polished, and without striae give the tips o f the shell q uite a different appearance
from the rest. In one specimen the la s t whorl has three equidistant keels—in the other the hinder keel is
p rominent, and there are three close slight keels in front. There was a fragment o f a shell brought from the
same place with the former, which is deeply spirally striated, longitudinally plaited, and slightly keeled like
the former, b u t it is ra the r more solid, more deeply striated, and the whorl h as an extra strong prominent keel
ju s t before the suture , which gives the shell a very different appearance. I am inclined to consider it only a
variety o f this species.
B u c c in um D o n o v a n i.
Bucc. glaciale. Donovan. Brit. Shells, t. 154.
In h a b . South Sea.
T he shell differs entirely from the B . glaciale o f L amarck {see Chemn. x. / . 1446,47 and E nc. 3 9 9 ./. 3 .) in
the whorls being very ventricose and rounded. I t varies in the thickness of the shell, and in the whorls being
more or less plaited, like B . undatum, and also in the w horls being rarely furnished with three or four slightly
striated spiral keels. B . glacialis o f Brown’s Conchology,' said to be taken a t Torbay, appears like an
elongated variety o f B. undatum.
B u cc in um B o r e a l e . Leach. App. Ross. Voy. 173.
This species is very like the coloured varieties o f B. undatum, b u t it is much smaller and thinner than
the undulated state o f tha t shell.
B u cc in um t e n u e , t. 3 6 . / . 39.
Shell ovate, conical, thin, pellucid, pale brown, very finely and closely spirally striated, and closely
longitudinally plaited, the p la its arched regular. The spire a cu te ; the whorls rounded.
Inhab. Icy Cape.
The oute r coat of this shell is very thin an'd powdery, and appears to separate very easily, for in most
specimens there are large spaces in which it has entirely disappeared, leaving a thin, pellucid, smooth shell, for
the outer coat alone is striated, and in most o f the shells it forms the longitudinal plaits.
T R IC H O T R O P IS .
Ju d g in g from the figure this animal appears to be very nearly allied to SuceinMm. The tentacles are
placed on the sid eo f the base o f a large retractile trunk. The penis is conic a l; the foot small.— See Zool.
Jo u rn . iv. t . 9 . / . 5 & 8.
COLUMBELLA.
The tentacles a reclose together a t the b a se ; the eyes are two-thirds from the base of the tentacles. The
frunk IS cylindrical from the unde r side o f the tentacles. The mantle edge is simple, with a rather long siphon
m front. The male organ is elongated, subcylindrical, slender. The tru n k is very long, large. The foot
rather small. The operculum is homy, oblong, like tha t o i Buccinum, with a subcentral longitudinal rib on
the inner side.
C o L U M B E L L A C R IB R A R IA .
Buccinum cribrarium. Lam. H ist. n. 43.
Columbella mitriformis, Brod. k King. Zool. Journ.—Lister. Conch, t 929
/ . 24.
The apex of this shell is constantly truncated like the apex of some o f the land sh e lls; this is n ot common
amongst marine shells, which has caosed the only other g ronp of sea shells in which this trunc a tion has
been observed to bo called T ru n cM d la . I have not observed it in any other Columhdla. The synonym of
Lamarck is added on the authority of his cabinet, and o f the plates o f the species which have been engraved
from the shell in his cabinet by the Prince Massena.
Lister’s figure is rather larger than the specimen there seen, and the mouth is rather more striated. It
has a thin, dark b rown, horny operculum which is nearly as large as the mouth.
C o lum b e lla c o s t e l l a t a , t. 36. / . 9. Sow. Zool. Proc.
Inhab. Panama & Coast of Africa.
C o lum b e l la m a rm o r a ta . i. 3 6 . / . 11.
Shell ovate, fusiform, smooth, white, yellow m a rb led ; apex red d ish ; front spirally s tria te d ; spire
conical, shorter than the m o u th ; whorls rounded. Mouth narrow, white, o u te rlip denticulated.
Inhab.
C o l u m b e l l a u n iz o n a l is .
Shell ovate, lanceolate, smooth, dark chocolate b row n ; spire conical, acute, as long as the m o u th ;
whorls convex, last with a central w hite band and spirally striated in front. Mouth ova te ; outer lip simple,
sinuous, inne r lip simple, slightly th ickened; throat smooth. Axis four lines. Operculum thin, pellucid.
In h ab . Arica, coast of Peru.
Pe rhaps rather a Nassa.
I t is to be remarked th a t J5Mcein«m l<Bvigatum, B . B ra silia n um , B . semiconvexum, B .fie x u o s um , B .
corniculatum, B . aurantium, B . dermestoideum, o f Lamarck, as well as this species are C o lum b e lla ; the
first is Col. concinna o f Sowerby.
OLIV A.
The foot of these animals is very large, expanded, ovate, and folded longitudinally when contracted into
the cavity of the shell. The mantle is thin, n ot in the least expanded, and ends in a very slender, long,
subulate process b ehind, which being twisted round the spire forms the groove over the suture. The head is
q uite in front, with two subulate, conical, ra the r long tentacles. T h e eyes are placed near the tip o f the
tentacles, which are very thin above them.
'Li
■! : " i
ii i