216 TERTIARY DENTALIUM. 



D. SOWERBYI Chenu, 1842 (not of Guilding, 1834). Illustr. 

 Conch., Vol. i, p. 7, pi. 6, fig. 2. Locality and horizon unknown ; 

 but it is probably a Pliocene specimen of D. entails L. or some 

 closely allied species. 



D. SOWERBYI Michelotti, 1847 (not of Guilding, 1834, nor of 

 Chenu). Descr. foss. terr. niioc. Italic Septentr., p. 145. 



Miocene, Turin. 



D. SPECIOSUM Guembel, 1861. Geognos. Beschreib. Bayerisch. 

 Alpengebirg., p. 668. 



Eocene, Bavarian Alps. 



D. SPIRALE Risso, 1826. Hist. Nat. Europ. Merid., Vol. iv, p. 

 401. 



Pliocene? " Trinite." 



D. SUBCOMPRESSUM Meyer, 1885. Amer. Journ. Sci., Vol. 29, p. 

 462, figured in Alabama Geol. Surv. Bull. No. 1 (2), 1886, pi. 3, 

 fig. 3, 3a; also Proc. Acad. Nat. Sci., 1887, p. 54, pi. iii, fig. 13 

 (Vicksburg). 



Eocene and Oligocene : Jackson Red Bluff and Vicksburg, Miss. 



The figured type-specimen is from Jackson (Meyer). 



D. SUBEBURNEUM d'Orbigny, 1850. Prodr. Pal. Strat., ii, p. 372. 



D. eburneum G. B. SOWERBY, Genera Rec. & Foss. Shells, 1825, 

 no. 15, f. 6 ; Desh., Descr. Annim. S. Vert. Bassin Paris, 1861, ii, 

 pp. 215, 216, pi. 2, f. 8-13. Not of Linnajus. 



Eustiaria circinata R. B. NEWTON, Syst. List Edwards Coll., B. 

 M., 1891, p. 284. Not D. circinatum Sowb. 



Eustiaria subeburnea Orb., NEWTON & HARRIS, Proc. Mai. Soc. 

 Lond., i, p. 65. 



Eocene, Paris Basin and England. 



The last-quoted authors distinguish this as a species distinct from 

 the recent eburneum Linn, (from type), and the Eocene circinatum 

 Sowb. 



D. SUBENTALIS d'Orbigny, 1850. New name for D. entalis Lam- 

 arck and Deshayes, Prodr. Paleont. Strat., Vol. II, p. 320, No. 431. 

 Loiver Eocene, Suessonien, Guise- Lamotte, etc., France. 



Probably a synonym of D. entale. 



D. SUBFISSURA (Tate) 1887. 



Entalis subfissura Tate. Trans. & Proc. R. Soc. S. Austral., 

 Vol. ix, p. 191, pi. xx, figs. 4a-4b. 



Earlier Tertiary, south Australia. 



