zoological Society. 373 



November 28. — Professor Owen, Vice-President, in the Chair. 



The following papers were read : — 



1. Descriptions of some new species of Ovulum in the collec- 

 tion OF Mb. Cuming. By G. B. Sowerby, Jun. 



1. OvuLUM UMBiLicATUM (Thcs. Conch. pi. 101. f, 88, 89). OvuL 

 testd globosd, subpyriforme, alba, roseo pallide tincto, dorso ad 

 extremitates rubro lineato, ad terminum posticum umbilicato ; aper- 

 turd subapertd ; labio externo angustato umbilicato; aperturd 

 subapertd ; labio externo angustato intiXs crenulato postice labium 

 internum superante ; labio interno postice tumorem elevatum den- 

 ticulatum ferente , ad canalem lineari, antice bicostellatd, ad cana- 

 lem uniplicato. 

 Agreeing with 0. margarita in general appearance, but the outer 

 iip is thinner, the mouth wider, the upper callosity elevated and den- 

 ticulated. There is also a small umbilicus behind the posterior ter- 

 mination of the outer lip. 



Hab. Ticao, Philippines ; by Mr. Cuming. 



2 OvuLUM lanceolatum (Thes. Conch, pi. 100. f. 35, 36). Ovul. 

 testd elongatd, angustatd, minutissime striatd, aurantio-rubescente, 

 seu albidd, canalibus subproductis , emarginatis ; aperturd angus- 

 tatd ; labio externo planulato cra^so, breviusculo, antice angulatim 

 jiexuoso ; labio interna tumido rubro longitudinaliter marginato, 

 postice ad canalem producto, subtortuoso, antice intus longitudi- 

 naliter sulcata, uniplicato, ad canalem angusto, rectiusculo, acumi- 

 nata. 

 A remarkable shell, presenting the appearance of 0. aciculare very 

 much lengthened. The aperture is narrow, excepting towards the 

 anterior, where the outer lip is bent out : the under surface is flat, 

 the inner lip edged with a reddish line. Collected by Mr. Cuming. 

 Hab. Sorsogon, Isle of Luzon, Philippines. 

 There is a white variety of this species (.-') from Molucca. 



3. OvuLUM UNiPLicATUM (Thcs. Couch. pi. 100. f. 30, 31, 32). 



OvuL testd elongatd, subcylindricd, pellucidd, minutissime striatd, 



aurantid, seu violaced, antice subacuminatd, postice subrotundatd ; 



dorso margine distincto ; aperturd subapertd ; labio externo pau- 



lulum incrassato, ad extremitates recedente, antice subangulato, 



ad canalem emarginato ; labio interno intiis subdepresso, postice 



spiraliter uniplicato, ad canalem tortuo, versus labium externum 



dejlecto, antice subtortuo acuminata. 



Specimens of the pale violet variety were obtained by Mr. Cuming 



from near Charleston, South Carolina ; a darker one from Rio 



Janeiro. 



This species resembles 0. aciculare, but is more acuminated at the 

 anterior extremity ; it is rather more ventricose, and finely striated. 

 The spiral fold near the anterior canal is more decided and less ob- 

 lique, and the edge of the canal above it invariably leans towards 

 the outer lij). 



