1872. Doitaliinn elepliantinuiii Linne. REEVE, Conch. Icon. XVIII, pi. i, fig. 5. 



? Dentaliuin elephantiniim Linne. Ci-IENU, Illustr. Conchyl. pi. i, fig. 4 — 10. 



? Dentaliuin elepliantinum Linne. Hanley, The shells of Linnaeus, p. 435. 



? Dentaliuin elephantimmi Linne. SOWERBY, The Genera of Shells, Zool. Journ. IV^, p. 196, 

 Dentalium fig. i. 

 1897. Dentalium elepliantinum Linne. PiLSBRY & Sharp, Man. of Conch, vol. XVII, p. r, 



pi. I, figs 1—7. 

 Not Dentalium elepliantinum Brocchi, Conch. Foss. Subapp. II, p. 260 (18 14). 

 Not Dentaliuin elepliantinum Philippi, Enum. Moll. Sicil., I, p. 245. 

 Not Dentaliuin elepliantinum Deshayes, Mon. genre Dent. (1825). 

 Not Dentalium elepliantinum Risso, Hist. Nat. Prodr. Eur. merid. IV, p. 399, 1826. 

 Dentalium arcuatum Gmel., Syst. Nat. (13), p. 3738 (1788). 

 Dentalium arcuatum Gmel., ANTON, Verzeichniss d. Conchylien, p. 25 (1839). 

 "< Dentalium elephantium Born, Mus. Caes. Vindob, p. 431. 

 Dentalium recurvum Deshayes (by error?) Mon. Dent. p. 30. 

 Dentalium striatum (in part) Born, I.e. p. 431. 



Diagnosis. .Shell robust, the greatest diameter somewhat less than one-sixth the length, 

 solid, strongly curved ; dark green, fading to white at the anal opening. 

 Sculpture, about 10 (9 — 11) strong, projecting rounded longitudinal ribs, 

 narrower than their intervals, which are concave, with one or several weak, 

 low riblets; growth striae delicate, inconspicuous. Aperture sub-circular, scarcely 

 oblique, modified by the ribs, especially on the concave side; anal orifice 

 p. ^ circular, its edge excavated within and slightly notched excentrically on the 



Anterior aperture of convex sidc. Length /O, diam. at aperture 11,5 X 11 mill., height of arch 



D. clcphaiitinuni. -ii i-i o ■ 



above chord 15,5 mill. (r. ec hn.). 

 Distribution. Amboyna (Rumphius); Philippine Isl. ; Molluccas; Red Sea (Issel). 



Remarks. This well known species of probably no unfrequent occurrence on the shores 

 of the East Indian Archipelago was not obtained by the Siboga Expedition. It is represented 

 in the collection of the Zoological Museum of Amsterdam b}- twelve fine specimens of which 

 eight have 10, two have 9 and two have 11 ribs of these five have the apex excentrically 

 notched either to the right or to the left. Of the i-emaining seven, four have perfectly round 

 apertures (of which two are relatively )oung individuals) while three have a slight supplemental 

 tube. In one specimen it forms a slight rim along the notched aperture as in D. entails^ in 

 the other two the projecting pipe, though short is round and the notch is only formed by the 

 outer layer of the shell. 



Length of the longest individual 90, diameter at aperture 10 mill. All from the Molluccas. 



*2. Dentaluiin foriiiosuDi Adams & Reeve. PI. I, fig. 2. 



1848. Dentalium formosum Adams & Reeve, Zool H. M.S. Samarang. Moll. p. 71, pi. 5, fig. \a,b. 

 i860. Dentalium formosum Adams & Reeve. SOWERBV, Thes. Conch. Ill, p. 102, pi. 223, fig. 2. 

 1872. Dentalium formosum Adams & Reeve, Conch. Icon. XVIII, pi. 2, fig. 7. 

 1S97. Dentalium formosum Adams & Reeve. Pilsbry & Sharp. Man. of Conch, vol. XVII, 

 p. 2, pi. 1, figs 9 — I I. 



Diagnosis. Shell robust, solid, cylindric, moderately curved. Sculpture of 13 — 16 



