Zoological Society. 53 



retusd, subcallosd; labro incrassato, paululum incurvato, inths 

 IcBviter denticulato ; aperturd angustd; columelld quadriplicatd. 

 Axis. 6 lin. 

 Hab. West Indies. 

 Cab. Cuming. 



In some respects similar to the foregoing, but, in the place of its 

 full rounded form, this is contracted towards the middle of the body- 

 whorl. The fasciation is constant on all the specimens, but always 

 very faint and indistinct, and the small milk-white spots are scattered 

 with little regularity over the surface. 



Marginella australis. Mar. testd refuse ovatd, albidd vel pal- 

 lide corned', spird conico-retusd ; labro incrassato, pone albido, 

 intus Icevi; columelld quadriplicatd, versus basin albo fasciatd. 

 Axis 3^ lin. 

 Hab. North-west coast of Australia ; in coral sand at low water. 

 Mr. Bring, R.N. 

 Cab. Cuming. 



The characters of this little shell are quite unobtrusive, if we ex- 

 cept the white base of the columella; and this may serve to distinguish 

 it from any species hitherto on record. 



Marginella vitrea. Mar. testd coniformi, hyalind, nitidd ; spird 

 valde retusd; labro paululilm incrassato et reflexo, intus Icevi ; 

 columelld plicis quatuor gracilibus. Axis 3 lin. 

 Hab. West coast of Africa. 

 Cab. Belcher. 



Marginella fusiformis. Mar. testd fusiformi, albidd vel pallida 

 corned ; spird elatd, obtusd ; anfractu ultimo gradatim attenuate ; 

 labro paululum incrassato, intils Icevi ; aperturd lineari ; columelld 

 quadriplicatd. Axis 3 lin. 

 Hab. Straits of Malacca ; in seventeen fathoms, mud. 

 Cab. Belcher. 



This species departs so far from the usual outline of the genus as 

 to become decidedly fusiform. The recent shell is most probably of 

 a delicate horn-colour, though the prevailing number of our speci- 

 mens are white, shining and glossy, and, there seems little doubt, 

 have lost their original colour. 



The following species belongs to a section of this genus, which 

 might with much propriety be separated as a subgeneric group, under 

 the name of Volvarina. They are all delicate and rather thin shells, 

 with an apparent spire, the labrum never varixed, and usually not 

 even thickened, with a sharp edge, always bent in on the aperture. 

 The columellar folds are nearly constantly four in number, slender, 

 and more or less oblique. M. avena, Valenciennes, is a typical spe- 

 cies. 



Marginella nitida (Volvarina). Mar. testd elongate ovatd, 

 fused, politd, nitidd, concolore ; spird conicd, obtusd ; labro tenui, 

 acuto, inflexo, pallido ; columelld quadriplicatd. Axis 4 lin. 



Hab. ? 



Cab. Cuming. 



