470 



ad extremitates rubro lineato, ad terminum posticum umbilicato ; 

 apertura sub-aperta ; labio externo angustato, intus crenulatOj 

 postice labium internum superante ; labio interno postice tumo- 

 rera elevatum denticulatum ferente, ad canalem lineari, antice bi- 

 costellato, ad canalem uniplicato. 



Agreeing with 0. margarita in general appearance, but the 

 outer lip is thinner, the mouth wider, the upper callosity elevated 

 and denticulated, and there is a small umbilicus behind the pos- 

 terior termination of the outer lip. 



From Ticao, Pliilippines ; Cuming. 



10. OvuLUM MARGINATUM (pi. xcix. f. 9, 10), Sowcrby, Sp. 

 Conch. No. 1. p. 5. 



0. testa ventricosa, sub-pyriformi, alba, linea aurantid ad mar- 

 ginem cincta, dorso costellato, extremitatibus obtusis ; apertusd 

 in medio sub-contracta, labio externo intus crenulato, in medio 

 prominente ; labio externo Isevi, intus excavato, postice tumorem 

 obliquum, crenulatum ferente, ad canalem emarginato, antice 

 tumido, ad canalem imiplicato. 



Of an oval ventricose form, slightly narrowed at the lower end, 

 the outer lip prominent in the centre, the enamel of the iimer lip 

 and the dorsal edge of the margin defined by a strong orange line 

 of colour. 



Locality unknown. 



11. OvuLUM PYRiFORME (pi. ci. f. 72, 73), Sowcrly, Sp. 

 Conch. No. 1. p. 5. 



0. testa ventricosa pyriformi, striata, fulvo nubeculata ; canali- 

 bus sub-productis, antico subreflexo, emarginato ; apertura antice 

 sub-aperta ; labio externo lato, intiis crenulato, ad canalem posti- 

 cum planulato ; labio interno expanso, intiis sub-excavato, postice 

 angulosim tumido, ad angulum nullo, antice tortuoso, tumido. 



The most pyriform of all the species. The posterior part of 

 the outer lip is flattened at its juncture with the inner. Colour, 

 clouded, yellowish-brown. 



From New South Wales. 



12. OvuLUM ADRiATicuM (xcix. f. 13, 14), Sowerhy, Sp. 

 Conch. No. 1. p. 4. 



O. testa ovali, ventricosa sub-pyriformi, alba, pellucida, dorso 

 obscure sub-costellato ; canaHbus brevibus, integris ; apertura 

 aperta ; labio externo angusto, intiis crenulato, labio interno Isevi, 



