9 
the dorsum of the channel to the anterior portion of the outer lip ; 
channel short. 
A variety of this species is rather larger in size, with the markings 
along the posterior edge of the three last whorls in somewhat distant, 
brown, square spots, from which rather distant undulating lines of a 
lighter colour pass longitudinally over the volutions, while in some 
specimens the colour is more en masse on the last whorl with small 
circular spots in it, showing the colour of the shell. 
Length, 35, of an inch; width, 54%, of an inch. 
2 100 2 100 
Hab. Marquesas. Cab. Gaskoin, Gubba. 
13. CotumBEeLLA AustRiINA. Testa oblongo-ovata, levis, nitens, 
albicans, punctulis distantibus pallidissime brunneis, fascidque 
anticd latd brunned ornata; spird acuminata, anfractibus sep- 
tem vel octo, convexiusculis ; suturd distinctd ; aperturd latius- 
culd, labio externo posticée intus emarginato ; margine acutius- 
culo versus canalem incurvo, intus denticulis prominentibus octo 
vel novem ; labio columellari recto, nitido, denticulis septem an- 
tice positis, margine externo subelevato ; peritremate albicante, 
aperturd intus violaceo-brunned ; canali subprominente, latius- 
culo, dorso canalis transversim striato. 
Shell oblong-ovate, of a dull white colour, smooth and shining, 
with light brown coloration, or interrupted from the anterior side of 
the volutions of the spire, and extending, more or less faintly, over 
them ; a much darker broad band occupies three-fourths, at its centre, 
of the last whorl, the colour gradually softening into the whitish an- 
terior, posterior, and outer portions of the whorl ; spire acuminated, 
constituting less than one half the length of the shell; volutions seven 
to eight, rather convex, slightly ridged at the suture ; aperture rather 
long, and moderately wide and straight ; outer lip forms a broad notch 
at its juncture with the body of the shell, edge sharp, curving much 
towards the channel, externally thickened ; within are eight or nine 
rather prominent denticulations, diminishing in size from their com- 
mencement at the anterior edge of the notch; imner lip straight, 
smooth and shining, with a row of about seven small, even, round 
teeth, which extend over the columella, and a very slightly raised 
sharp varix forms the outer edge of the aperture proceeding to the 
end of the channel; from this varix fine striz pass over the dorsum 
of the channel to the anterior part of the outer lip ; peritreme whitish, 
the interior of the shell of a rather violaceous colour ; channel slightly 
projecting, moderately wide. 
Length, 55° of an inch; width, 23, of an inch. 
Hab. Australia. Cab. Cuming, Gaskoin. 
14. CotumBetua BAccaATA. Testa oblongo-ovata, albicans, fas- 
ciis tribus interruptis saturate rufescenti-brunneis, punctulis 
opacis albicantibus rotundis per lineas obliquas vel longitudi- 
nales positis ; spird acuminatd, anfractibus septem, quorum tri- 
bus anticis levibus, posticis obtuse longitudinaliter striatis ; 
apice albicante ; aperturd latiusculd intus albicante fasciis 
