DEN T A L I U M. 



Species C. (Mus. Brit.) 

 Dextalu'm Ht;.\.\i.(iNr.M. Ihii. t,fln ulli'i, aw/iisthi)'- 



rul'i, subfolkh'i, mnliorntir an-mit^'i, lmvi>/at/i ; 



costis angulatis Iwrilms se.r aii;;iilos li'stxr ejfonnan- 



tibus ; apice integro. 

 The hexagonal dentai.ium. Shell white, rather 



narrow, rather solid, with a medium curve, smooth, 



with six angular smooth ribs forming the angles 



of the shell ; apex entire. 

 Gould. Invert. Massachusetts. 

 Ifab. North America, China, and Singapore. 



SowKUBY. Thex C<i] 

 llah. New Zeiiland. 



This shell is mu: 

 than Di'iitiilitnn rectm. 



Species 7. (Mus. Belcher, oliin.) 



Dkxtalu'm FOiniosuM. Den. trsti'i vnliiU'. urcnnli'i, 

 ni/i/-/, I'n sriiili, <ti-uiniii<it''i. hilii, viridi, rubra, 

 orriili,::/!!, civkI'' alli i-iialuii j'li^i-ititi't ; COSlis ipiiii- 

 (/rri}ii rn/ii/if:. rolviidis, mpiulibus, longitudinctlibus 

 laqumti'i ; apice fissuratd, aptrturd magna. 



The beautiful Dentalium. Shell strongly arched, 

 rapidly increasing, acuminated, wide, banded 

 alternately with vivid green, red, and blue ; tinted 

 with fifteen longitudinal, strong, rounded, equal 

 ribs ; apex fissured ; aperture large. 



AnAMS AND Eeeve. Voy. Samarang, p. 71. 



Hah. Sooloo Archipelago. 



This beautiful species increases more rapidly in size 

 from apex to aperture than any other. 



Species 8. (Mus. Cuming in Brit.) 

 Dentalium zelandicum. Den. testa rectiuscuh'i, 

 angustd, paltide fusco ferrugine.o fasciatd, costis 

 nunierosis nigosis arcuatd ; vix urciiatd ; apicc 

 Jissurato ; apertuvd angusiiuscidd. 

 The New Zealand Dentalium. Shell rather straight, 

 narrow, banded with pale ferruginous brown, 

 armed with numerous rovigh ribs, very little 

 arched ; apex fissured ; aperture rather narrow. 



■■pjecies : 



rrower and even straighter 

 which it bears some rcsem- 



b. .AIus. Cum. in Bnt.) 



I),,i.l,st.; ,l,m;l„t,;,a„./>,.<l/, 



Dentalium lon(;iti:i 



valide arcuati'i. /i('lili.<si/i,:i, sm-ciued, .sid/jnlliicid,i ■ 

 apice breviter Ji.<sarat:i ; apcrtuni angustd. 



The Long-hacked Dentalium. Shell elongated, narrow, 

 strongly arclied, very much polished, amber- 

 coloured, rather pellucid; apex shortly fissured; 

 aperture narrow. 



Reeve. Conch. Syst. 



Dentalium polilum. Deshayes, not Linna?us. 



Dentalium Lavmrckii. Chemn. 



Ilab. rhilippines. 



The difference in curve between the two specimens 

 figured tends to point out that that character is not by 

 any means to be relied on as indicating difference of 

 species among the Dentalia. 



Species 10. (Mus. Cum. in Brit.) 



Dentalium inteustiuatum. Dnn. tesfa elongatd, mediv- 

 criter arcuatd, angustd, costis validis, rotuiidis 

 circa decern laqueatd ; interstitiis kmgdudinalitcr 

 striatis. 



The intki;sti!IATed Dentalium. Shell elongated, 

 moderately arched, narrow, fluted with about ten 

 strong rounded ribs ; interstices longitudinally- 

 striated. 



SoWERBV. Thesaurus Conchyliorum, Dentalium, Sp. ;!8. 



Hah. Island Bohol, Philippines. 



Nearly resembling Dentalium aprimnn in form and 



colour, but striated between the ribs. 



November, 1872. 



