18 
transversis ; basi rotundatd, levi; aperturd latd anticé pre- 
cipue; canali latissimo ; labio lato, marginato, ultra apicem 
extenso; columelld anticé quadriplicatd, plicis duabus anticis 
concurrentibus canalem intermediam formantibus ; apice oblito. 
Shell oblongo-ovate, of an uniform, opaque, pale-greenish colour, 
highly polished, with four distinct, nearly equidistant, very narrow, 
uninterrupted, even, red lines or bands, surrounding the shell from 
the upper or outer edge of the incrassated margin of the lip, which con- 
tinuing within the columella, extend over the earliest formation of 
whorls: these lines are equally conspicuous on the inside of the last 
whorl, and no doubt throughout the whole inside of the shell. The 
same pale-greenish colour pervades the inside as the outer part ; base 
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 conjom and form 
the inner side of the channel ; the two posterior are on the columella ; 
between the inner 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, 2°; of an inch; wide, 45, 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. 
Marcinetxa pupica. Marg. testd oblongo-ovatd, albidd, fasciis 
sex vel septem, transversis, continuis, pallidissimé viridi-fulvis ; 
maculis distinctis pallidissimé brunneis interruptis ; bast rotun- 
datd ; aperturd latiusculd ; labio crasso, marginato, ultra api- 
cem extenso ; columelld quinqueplicatd ; 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 
