TERTIARY DENTALIUM. 215 



D SANDBERGERI Bosquet, 1859. Neerland. Verb. Kon. Akad. 

 Wetensch.. Vol. vii, p. 20, pi. ii, fig. 7. 



D. entalis BRAUN (not of Linn.) Walchn. Geognos., II Aufl., p. 

 1,121 (quoted by Pictet &Campiche, Paleont. Suisse). 



D.fissura NYST, 1843 (not of Lamarck, 1818). Mem. Courron. 



Sav. Etrang. Brussels, Vol. xvii, p. 346. 



Eocene, Paris Basin, etc. 



D. SEMIALTERNANS Chenu, 1842. Illustr. Conch., Vol. i, p. 7, pi. 



4, fig. 7. 



Horizon and Habitat unknown. Probably Tertiary* 



D. SEMICLAUSUM Nyst, 1835. Eecherches Coq. foss. prov. An^ 

 vers, p. 36, pi. 5, fig. 53. See also Nyst, Ann. Mus. Roy. d'Hist. 

 Nat. Belg., iii, pt. 1, p. 120, pi. 7, f. 14. 



Pliocene, Scaldisien stage, near Antwerp, Belgium. 



D. SEMINUDUM Deshayes, 1864. Descr. Anim. s. Vert. Bassin 



Paris, Vol. ii, p. 200, pi. 3, figs. 11-14. 



Eocene of the Paris Basin. 



D. SEXANGULUM Gmelin, 1788. Syst. Nat. (13), p. 3,739, no. 

 21. BROCCHI, Conch, foss. Subapp., ii, pi. 15, f. 25. SACCO, Moll. 

 Terr. Terz. Piemonte e Liguria, pt. 22, p. 92, pi. 7, f. 48, to 54. 



D. elephantinum BROCCHI, t. c., p. 260 (in part). DESHAYES, 

 Mem. Soc. Hist. Nat. Paris, p. 347, 348. Risso, Hist. Nat. Eur. 

 Merid., iv, p. 399, and of some other authors. 



D. sexangulare LAMARCK, 1818. Anim. s. Vert., Vol. v, p. 344, 

 and of most other authors. 



D. sexangulare var. acutangularis Cocconi, 1873. Mem. Accad. 

 Sci. Bologna, 3, Vol. iii, p. 645. 



D. sexangulare var. subrecta Cocconi, 1873. Mem. Accad. Sci. 

 Bologna, 3, Vol. iii, p. 645. 



f D. noe Bonelli in SISMONDA, Osserv. Miner, e Geol. Piemonte, 

 p. 35. D'Orbigny, Prodr. Paleont, Strat., Vol. iii, p. 178. No. 255. 

 This may be referable to D. subsexangulare Orb., q. v. 



D. SIMPLEX Michelotti, 1861. Et. Mioc. Inf., in Natuurkundige 

 Verhandl. Hollandsche Maatschappij Wetenschappen te Haarlem 

 (2), xv, p. 136, pi. 13, f. 12, 13. 



Oiigocene of Italy, at Carcare, Dego, Mioglia, Pareto, Cassinelle, 

 etc. 



D. SOLIDUM Hutton, 1873. Cat. Tertiary Moll. New Zealand, 

 p. 2. 



. Tertiary (Pareord}, New Zealand. 



Referred to D. giganteum Sowb. as a synonym by some authors. 



