Zoological Society. 223 



This shell will always be readily distinguished by its elongated 

 form, shouldered ribs, and by the remarkable circumstance of the 

 plaits on the columella being reversed in size, the inferior being the 

 largest. 



Cancellaria funiculata. Cane, testa ovatd, elongatd; anfrac- 

 tibus senis, costatis, supern'e subangulatis ; costis subdistantihus 

 elevatis, rotunda f is, nodulosis, lineis elevatis de cus satis ; suturd 

 profunda ; labro intHs sulcata ; columelld plicis tribus parvis ; um- 

 bilico marginato ; canali subnullo. Axis 8 lin. 



Hab. A single specimen only was obtained by the dredge from 

 seven fathoms, sandy mud, in the Gulf of Magdalena, California. 



Cancellaria bicolor. Cane, testd retusd, contabulatd, fusco- 

 nigricante ; anfractibus septenis, angulatis, procul costatis ; costis 

 acutis, lineis elevatis distantibus decussatis ; aperturd trigond, 

 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. Cane, testd ovatd, acuminatd, pallidd, 



contabulatd; anfractibus senis, ventricosis, lamellis numerosis 



confertis, crenatis, in loco costarum instructis ; aperturd trigond ; 



labro incrassato, reflexo ; columelld plicis tribus parvis ; umbilico 



magno ; canali subnullo. Axis 7^ 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 lamellae, 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 Tire usually crowded 



