49 
superne callositate albd ; labro reflexo, intiis sulcato; columelld 
triplicatd ; umbilico magno. Axis 11 lin. 
Hab. Straits of Macassar; from ten fathoms, coarse sand. Mr. 
Cuming obtained specimens at the Island of Corregidor, Bay of Ma- 
nila, from seven fathoms, also in coarse sand. A banded variety was 
obtained in the same locality. 
A nearly allied species is the American shell, C. rigida of Sowerby ; 
but the present is a larger shell, with sharper distant ribs, crossed at 
regular distances by slightly elevated lines, and the peritreme is not 
crenulate. The ribs of C. rigida are nodulous from the crossing 
lines, which are also disposed to rugosity throughout. In C. bicolor 
the lines are particularly regular and uniform in their characters. 
This is one of several species which were obtained both in the Sul- 
phur and by Mr. Cuming in the Asiatic seas. It is worthy of re- 
mark, that the specimens from the seas about the Philippines are 
uncommonly fine, and the use of them permits me to complete my 
descriptions more fully, and to note with more accuracy their geo- 
graphical diffusion. 
CANCELLARIA LAMELLOSA. Canc. testd ovatd, acuminatd, pallidd, 
contabulatd ; anfractibus senis, ventricosis, lamellis numerosis 
confertis, crenatis, in loco costarum instructis ; aperturd trigond ; 
labro incrassato, reflexo ; columella plicis tribus parvis ; umbilico 
magno ; canali subnullo. Axis 74 lin, 
Hab. This species has an extensive habitat, being found in several 
places in the Indian Archipelago and at the Cape of Good Hope. 
At the latter a single specimen was obtained on the Lagulhas Bank 
in seventy fathoms; also at Ceylon and in the Straits of Macassar. 
Mr. Cuming also procured specimens in seven fathoms, coarse sand, 
at the Island of Corregidor, in the Bay of Manila. , 
Corresponding to the customary situation of the ribs, this species 
throws off series of lamelle, two or more in number, which present a 
sharp, reflected, crenated margin. These are clustered together in 
very irregular numbers, sometimes there being only two, or perhaps 
even one ; but as the shell advances in age they are usually crowded 
together in some numbers, and this remarkable and elegant character 
will readily distinguish it from any other species. 
CANCELLARIA ANTIQUATA. Canc. testd ovatd, acuminatd, contabu- 
latd, albidd ; anfractibus septenis, planulatis, costatis, transverse? 
striatis ; costis acutis, supern® spinis cavis desinentibus ; apertu- 
rd trigond; labro reflewo ; columella plicis tribus minimis ; um- 
bilico maximo. Axis 7 lin. 
Hab. New Guinea; in twenty-two fathoms, coarse sand. Also ob- 
tained by Mr. Cuming at the island of Corregidor, Bay of Manila, 
in seven fathoms, coarse sand. 
A species nearly allied to the singular C. trigonostoma, having a 
similar relative situation of the whorls to each other, anda very large 
umbilicus. This is a smaller shell, with a shorter spire, and sutures 
less profound. 
