72 Zoological Society. 



larger ones on both margins, and a remarkably large spot of the same 

 colour about the centre of the dorsum : base rather round, of a very 

 light reddish yellow colour : ajjerture rather narrow, slightly flex- 

 uous, somewhat wider towards the anterior extremity : columella 

 rather gibbous at the posterior half of the shell ; no columellar groove : 

 teeth rather bold, whiter than the base, even, excepting those at the 

 anterior end of the columella, where they are larger : all terminate ex- 

 ternally on the columella in an even line at the edge of the aperture, 

 and within, also in an even line, on the columella, except two or 

 three at the anterior end, which advance a little more inwards ; those 

 on the lip are even, and extend a little over it, outwards ; in number 

 they are from sixteen to eighteen on the columellar side, fourteen to 

 sixteen on the lip ; interstices between the teeth and between the 

 extremities more or less of an orange colour : extremities produced, 

 the posterior curving towards the columella ; the posterior outer beak 

 longer than the inner, the anterior very slightly so : margins, the 

 outer prominent, angular, more so towards the anterior extremity ; 

 the inner exists but on the anterior third of the shell, and is also 

 prominent and angular ; a groove across the anterior end, from the 

 depression formed on either side by the projecting margins, and ter- 

 mination of the channel reflecting outwards : spire umbilicated, with 

 a notch or groove on the columellar side, from a partial reflection of 

 the posterior channel : internal colour light reddish brown. I have 

 seen but four examples of this shell, two perfect and two decorti- 

 cated. Axis, ^ths ; diameter, |ths of an inch. 



Hab. Island of Corregidor, Bay of Manilla. Found in coarse sand 

 and gravel at seven fathoms. 



In the collection of H. Cuming, Esq. 



Decorticata light brown colour ; large darker spot in the centre of 

 the dorsum well-marked ; a brown spot on the outside of each ante- 

 rior extremity ; aperture much paler than in the perfect shell. 



I know no species with which this elegant shell could be con- 

 founded; the remarkable, large, well-defined spot on the dorsum, 

 the orange (more or less) coloration between the teeth and beaks, and 

 its gradually attenuating graceful form, distinguish it from all others. 



Mr. Cuming, whose valuable labours in the service of natural 

 history were rewarded, inter alia, by the discovery of this shell, 

 during their four years' continuance in the Philippine Islands, has 

 requested me to name it after an amiable and liberal collector. Miss 

 Saul, and it has afl"orded me much pleasure to comply with his wish. 



Cypr^a leucostoma. Cyp testd ovatd, ventricosd,fusco-cinered ; 

 lateribus inaculatis, macula magna irregulari dorsuli castaned, 

 lined dorsali pallidd percurrente ; marginibus rotundatis crassis; 

 extremitatibus posterioribus crassis prominentihus dexlro prcecipue, 

 ant ids convergent ibus ; bust rotundatd, alhicante margine interna 

 labii nonnunquam obtuse deiitato, columelld edentuld. 



Shell ovate, gibbous, smooth ; of a brownish ash-colour, spotted 

 on each side with darker spots, the general ash-brown colour on the 

 sides declining in intensity ultimately to Avhiteness; a large chestnut- 

 brown, irregular, sj)lashed, or dotted spot on the dorsum ; in some 



