D E i\ T A L I U :\I. 



Species 13. (Fi<r. a, b, c, d, Mus. Brit.) 



DeNTALIUM NOVEMCOSTATl'M. />'«• teSt'i .--(ili'ld. pli'- 



1-umque i-ubrA fasciatii ; gvadatim crescent!, vieiUo- 

 rriter arcuatd, costis novem, solidis, rutundis, infra 

 medium et versus margimm eraniilis la<iueatit ; 

 interstitiis striatis ; apice integro. 

 The nine-ribbed Dentauum. Shell solid, gciu-rally 

 red banded ; gradually increased, xnodcrately 

 curved, fluted with nine solid, rounded ribs dis- 

 appearing below the middle, and towards the 

 margin ; interstices striated ; apex entire. 

 La.maiick. Dediayes, monograph of Uentalium, |.l. ii. 



f. 11, 12. 

 Dentalium fasciatuin, Lamarck (var.). 

 Ilab. Mediterranean. 



Towards the apex the ribs are strong, and the inter- 

 stices deep, but become fainter from the middle, till at 

 the margin there is hardly a trace of them. 



Species 14. (Mus. Brit.) 



Dentalil-m Javaxum. Dai. te.sld p,,l!t,1, pallidc 

 succined, Vfdide arcuatd, gradaliin crescenti, roatis 

 ocio angulatis <eqnidistantibus laqueutd, interstitiis 

 latis, planatis ; Jissurd apicali pared. 



The Java Dentalium. Shell polished, pale amber, 

 strongly arched, gradually increasing, fluted with 

 eight angular, equidistant ribs ; interstices wide, 

 flat ; apical fissure small. 



So\VEi:t!Y. Thesaurus Conchyliorum, Dentalium, Sp ;10, 

 f. 12. 



llab. Java. 



Species 15. (:\Ius. Taylor.) 



Dentalium bisexaxgulatum. l>< h. t,--i:'i 



pallidissime fusciatd, sdlid'i. ndid,'- anii 



diitim crcsrenti, costis undi riia nl diiodcci 



rutundis hiqucald ; aiiiec hrceitcr /i-;^'(ratr 



tlhidd 

 ', .'/'■"■ 



Snlidi, 



The TvvELVE-RiiiiiEi) Dentalium. Shell whiti.sh, very 

 pale banded, solid, strongly curved, gradually in- 

 creasing, fluted with eleven or twelve solid, 



SoWEItliV. Till 



f. 8. 

 Ilah. Ja^ 



Species 10. (Mus. ('intiiiig.) 

 Dentalium i:i;ii:Ni;rM. /'-//. /<•.</</ tluiKjui 



semip.lliirid,,. i.„ili,li .s,<rri,icd, wnlinrri 



apice atteniiat.i. fi.<s,ir,i „/>ir,ili hiYr,s>iiii,i. 



The ivouY Dkntai.h-m. Shell ehmgated, narrow, 

 semipellucid, i)alo amber - coloured, not very 

 strongly arched, banded with numerous elevated 

 concentric rings ; ape.\ attenuated; afiical fis.sure 

 very small. 



Linn.eus. Systema Xatura?. 



Dentalium annidatniit, Sowerby. 



Dentaliun ludicmn, Chemn. 



Hab. Indian Seas. 



Species 17. (Fig. a, i, Mus. Brit.) 

 Dentalium Tarentinum. Den. testa solid/,, laid, 

 validi- arcuatd, rapid!: crescent!, albidd, nonnnnquam 

 versus apiceni rosea tinctd, medio et ad niarginem 

 Icerigatd, versus apiccm minut!; striatd ; a.pire ple- 

 rumque integro, acum!nnt<,. 

 The Tarentum Dentalium. Shell solid, broad, strongly 

 arched, rapidly enlarged, whitish, sometimes tinged 

 with rose-colour near the apex; smooth at the 

 middle and near the margin, minutely striated 

 towards the apex : apex generally entire. 



November, 1^7 



