Zoological Society. 63 
round and smooth ; aperture wide, especially at the anterior portion, 
where the columella suddenly contracts in diameter, subspiral, curved 
posteriorly ; channel very broad, which and the edge of the lip are 
subpellucid and whitish ; at the anterior part of the columella are 
four prominent rather tenuous plaits :the first two conjoin and form 
the inner side of the channel ; the two posterior are on the columella ; 
between the imer side of the channel and the anterior third of the 
columella is a concavity ; lip thick, smooth, extends beyond the apex, 
no trace of crenulation, strongly marginated, and the margin has its 
upper edge or rim of a darker colour than the shell; it proceeds over 
the arch of the channel, and becomes obliterated just above the third 
plait ; apex imperceptible. 
Long, 59°, of an inch; wide, ;435 of an inch. 
Hab. 
The only specimens I have seen of this species are an adult shell in 
the cabinet of Mr. Metcalfe, and an adult and a young one in my own ; 
all of which were brought to this country in H.M.S. the Samarang. 
It cannot be confounded with any known species of Marginella ; 
the four narrow conspicuous red lines or bands, the two anterior plaits 
being a bifurcation of the inner wall of the channel, the wide aperture, 
and general form of the shell are ample distinctives. 
Marernetia pupica. Marg. testd oblongo-ovatd, albidd, fasciis 
sex vel septem, transversis, continuis, pallidissime viridi-fulvis ; 
maculis distinetis pallidissime brunneis interruptis ; bast rotun- 
datéd ; aperturd latiusculd ; labio crasso, marginato, ultra api- 
cem extenso ; columelld quinqueplicatda ; canali lato et profundo ; 
margine interno labii minute denticulato ; apice lato, obtuso. 
Shell oblong-ovate, of a white colour, having six or seven very faint 
greenish-brown bands traversing the shell from the border of the 
aperture to the upper edge of the margin, interrupted by rather large, 
distinct, very light-brown spots or markings; these bands have be- 
tween them broad white lines, which are the colour of the shell; the 
posterior end of the shell is in an evenly projecting ridge or varix, 
surrounding the spire; base round, colour of the shell; aperture 
rather wide, curved (bowed) ; lip thick, extending a little beyond the 
apex, as described in reference to the posterior portion of the shell ; 
margin rather thick, and extending over the arch of the channel ; the 
columella is furnished with five plaits, the three anterior are promi- 
nent, especially the second, which extending over the base obliquely, 
forms a thickened varix ; small obtuse denticulations exist along the 
whole inner edge of the lip; channel deep and wide ; apex broad and 
obtuse. 
Long, 28, of an inch; wide, ;18, of an inch. 
Hab. Central America. 
Cab. Metcalfe, Gaskoin, Cuming. 
In size, form, markings, fewer plaits, the denticulations on the 
inner edge of the lip, &c., separate this species from all others ; its 
nearest affinity may be the Marginella tessellata, Lam., although 
even that affinity is very distant ; in the size remarkably so. 
