TERTIARY DENTALIUM. 217 



D. SUBGIGANTEUM d'Orbigny, 1852 (new name for D. giganteum 

 'Sowerby, 1846, not of Phillips, 1836). Prodr. Paleont. Strat., Vol. 

 iii,p. 94, No. 1,764. 



D. giganteum SOWERBY, 1846 (not of Phillips, 1836). Darwin's 

 Geol. Observations on S. America, p. 263, pi. ii, f. 1. 



D. corrugatum Hupe in GAY, 1854. Hist. Chili, p. 276, Atlas 

 Zool., pi. 2, fig. 8. 



Karlier Tertiary, coast of lopocaima, Chili; also New Zealand 

 Miocene. 



D. SUBIRREGULARE Pilsbry & Sharp, 1898. New name for 

 D. ir regular e Seguenza not Risso. 



D. irregulare SEGUENZA 1879, Form. Terz. Prov. Reggio (Cal- 

 abria), p. 275, pi. 10, f. 33, 33a. 



Pliocene, Astian Stage, Italy. 



D. SUBSEXANGULARE d'Orbigny, 1852. New name for D.sexan- 

 gulare Deshayes, 1825. Prodr. Paleont. Strat., Vol. iii, p. 94, No. 

 1,755. 



D. subsexangulatum D'ORBIGNY, 1852. A mistake for D. subsex- 

 angulare d'Orb. Prodr. Paleont. Strat., 1852, Index, p. 59. 



D. sexangulare DESHAYES, 1825. Mem. Soc. Hist. Nat. Paris, ii, 

 ; p. 350, pi. xvii, figs. 4-6. Not of Lamarck. 



Sacco (1. c.) recognizes and figures varieties striolatissima Sacco, 

 noe Bon. (==aprinum Brocchi and others), magnocostata Sacc.,pera- 

 cuta Sacc., ac at angular is Cocc. (=colligens Sacc.). 



Tortonian stage, Upper Miocene, to the Astian, Upper Pliocene, 

 Piedmont. 



D. SUBSTRIATUM Deshayes, 1825. Mem. Soc. Hist. Nat. Paris, 

 Vol. ii, p. 366, pi. xviii, figs. 1-2. 



Fustiaria subdriata NEWTON, 1891. Brit. Oliogocene & Eocene 

 Moll., p. 286. 



Entaliopsis substriata NEWTON & HARRIS, 1894. Proc. Malacol. 

 Soc. London, Vol. i, p. 68. 



D. acuticostum var., J. DE C. Sow., in Dixon's Sussex, 1850, p. 96, 

 pi. 7, f. 16. 



Eocene, Barton and Bracklesham beds, England ; Paris Basin. 



D. SULCATUM Lamarck, 1818. Anim. s. Vert., Vol. v, p. 343; 

 .figured in Deshayes, Descr. Anim. s. Vert. Bassin Paris, Vol. ii, pi. 

 l,figs. 33-35, 1864. 



Eocene of the Paris Basin. 



