Zoological Society. 65 
This species approaches nearest in form to the Mary. triticea of 
Lam., but has a much narrower aperture, and the edge of the lip is 
strongly serrated its entire length. 
MARGINELLA CONTAMINATA. Marg. testd oblongo-ovatd, pallidé 
Jloris lactis colore; extus tenuissimé striatd; aperturd latd, 
labio crasso, columella sexplicata, plicis tribus anticis prominen- 
tioribus ; margine lato, planulatogue ; apice prominente obtu- 
Sissimo. 
Shell oblongo-ovate, of an uniform pale cream colour, without 
bands or markings; internally the colour is somewhat darker; ex- 
ternal texture of the shell is finely striated : the striee terminate ante- 
riorly at the thickened varix over the arch of the channel curving to- 
wards the columella, and in a similar manner at the edge of the white 
deposit around the spire ; base round, aperture wide, slightly curved; 
on the columella are six or more white plaits, the three anterior being 
rather prominent, the first continuing to form the inner side of the 
channel; the second forms a varix on the base of the shell; the 
channel broad and deep; a white deposit exists on the columella 
within the aperture, which widens and thickens outwardly from about 
the anterior fourth of the aperture, covering the plaits and proceeding 
over the arch of the channel, forming there a ridge or varix at its 
posterior edge, and diminishing in width as it approaches the lip, 
along the whole length of which it continues forming a broad flat 
margin, and terminates around the spire, which is also covered by it: 
apex slightly prominent, very obtuse. 
Long, 1 inch; wide, 55, of an inch. 
Hab. ? 
Cab. Cuming, Gaskoin. 
It differs from Marginella cornea, Lam., in its more elongated 
form, the number, distribution and construction of the plaits, in its 
broad, flat margin, in the thinness and planeness of the lip internally, 
the varix at the anterior part of the base, &e. 
MARGINELLA LINEATO-LABRUM. Marg. testé ovatd, levi, an- 
Sractibus postice rotundatis, pallidée flavescente, nigro lineato- 
punctatd; spird prominente ; basi rotundatd; aperturd latis- 
simd ; columelld quadriplicatd ; labio crassiusculo, marginato, 
lineis octo vel novem transversis, supra labrum et marginem 
continuis. 
Shell ovate, smooth, the whorls even (not crenulated), of a light 
ellow-brown colour, having on the last whorl nine rows of distinct 
small black spots, or short markings, obliquely longitudinally place ¢, 
the two posterior rows of which are continuous along the whorls of 
the spire even to the apex; spire very prominent, whorls rather gib- 
bous ; base round ; aperture very wide ; the columella has four white 
prominent plaits, the two anterior passing obliquely outwards, the 
first to form the inner elevated side of the channel, the two posterior 
are transverse ; lip, slightly bowed, is thick and marginated, and has 
eight or nine nearly equidistant, dark-reddish, somewhat broad lines 
crossing its edge and continuing over the margin ; margin continuous, 
Ann. & Mag. N. Hist. Ser. 2. Vol. v. 5 
