17 



*I4. Dentalmni Chevcrti Sharp & Pilsbry. 



1877. Dcntaliuin scptciiuostatutn Braz., Proc. Linn. Soc. N. S. Wales, II, p. 57. 



(Not D. septemcostatmn Abich 1859). 

 1897. Dentalium Chcverii Pilsbry & Sharp, Manual of Coiich., vol. XVII, p. 9. 



Diagnosis. Shell white, slightly arched, 7-ribbed, ribs somewhat sharp, having finer 

 ones between, e.Ktending froni the base to the center, interstices with fine transverse silk-like 

 striae; apex perforated, perforation with a minute notch-hke fissure on the dorsal margin; 

 aperture circular, entire. Length 14, diam. apex 0,5; base 1,5 milL (P. & Sh. from Br.vz.). 



Dis tr ibu t i on. Evans" Bay, Cape York, North AustraHa. 6 fins sand (Chevert Exp.). 



Group of D. OCTANGUL.\TUM. 



Octagonal or eight-ribbed at and near the apex. 



I. The whole shell decidedly octagonal. 



a. 8 — 9 strong ribs at the apex, becoming lower and more obtuse toward 



aperture. Length 50 mill. lo times the diam octangnlatum. 



a' . 8 strong prominent narrow ribs. Length 50 — 80 mill. 12 times the diam. javamiin. 

 a" . 8 marginating narrow ribs. Length 45 mill. 15 times the diam. . . tnbifonne. 

 II. Shell eight-ribbed only at the top; interstices subdivided by secondary and 

 tertiary riblets. 



Greatest diam. about Vi;, the length oryx^ leiicoryx. 



Greatest diam. about Vu the length cancellatuin. 



*i5. Dentalium octangidatiun Donovan. PI. I, fig. 8. PI. IV, figs 8, 9. 



1803. Dcntaliuin octangulatitiu Donovan, Nat. hist. Brit. Shells V, pi. 162 (quoted octangulinn 

 by TURTON. 



18 18. Dentalium octogonuni Lamarck, An. s. Yert. V, p. 344. 



1819. Dentalium striatulum (in part) Turton, Conch. Dict. Brit. Is. p. 352, pi. 16, fig. 5, 6. 

 ? Dentalium apriniim Mawe, Linn. Syst. Conch. pi. 33, fig. i (not of LiNNÉ). 



1825. Dentalium octogonum Lamarck. Deshayes, Mem. Soc. Hist. Nat. Paris, II, p. 352, 



pi. 16, figs 5, 6. 

 1841. Dentalium octogonum Lamarck, Delessert Ree. de Coq., pi. i, fig. i. 



? Dentalium octogonum Lamarck. Chenu, Illustr. Conchyl. I, p. 5, pi. i, fig. 21 — 23. 

 1860. Dentalium octogonum Lamarck. SOWERBV, Thes. Conch. III, p. 102, pi. 223, fig. 9. 

 1872. Dentalium octogonum Lamarck, Conch. Syst. II, pi. 36, fig. 8. 



1874. Dentalium octogonum Lamarck. LiSCHKE, Jap. Meeres Conch, II, p. 103, III, p. 75, 

 pi. 5, figs 1—3. 

 ? Dentalium octogonum Lamarck. DUNKER, Index AIoll. Mar. Jap., p. L53. 



1877. Dentalium octogonum Lamarck. Brazier, Proc. Linn. Soc. N. S. Wales II, p. 55. 



1878. Dentalium octagonum Angas, Proc. Z. S. p. 868. 



1897. Dentalium octangnlatum Donovan. PiLSBRY & Sharp, Man. of Conch., vol. XVII, p. 16, 



pi. 2, figs 16, 17, 18, 22. 

 Not D. octagonum Costa, Fauna Reg. Nap. Dent. p. 19, pi. i, fig. 6 (1850). 



SIBOGA-EXPEDITIE LIV. 3 



