TERTIARY DENTALIUM. 203 



D. DissiMiLE Guppy, Quart. Journ. Geol. Soc, xxii, p. 292, pi. 17, 

 f. 4 (1866).— PiLSBRY & Sharp, Proc. Acad. Nat. Sci. Phila., 1897, 

 p. 469. pi. 11, f. 3-5. 



Oligocene, Bowden, Jamaica. 



D. DISSIMILE var. ponderosum Gabb, 1873. Pilsbry & Sharp, 

 t. c. p. 470, pi. X, figs. 1, 2, 3 ; pi. xi, figs. 15, 16. 



D. ponderosum Gabb, Trans. Anier. Philos. Soc. (N. Ser.), xv, p. 

 244. 



Oligocene of San Domingo. 



D. DOiXFUsi Koenen, 1 883. Neues Jahrb. Min. & Geol., Beilage- 

 Band, ii, p. 326. 



Miocene of North Germany, etc. 



Proposed as a new name for D. costatum Nyst in Dewalque, Pro- 

 drome d'une Descript. Geol. Belgique, p. 425 ; 2d edition, 1880, p. 

 483, 



Koenen states that this is not the costatum of Sowerby ; but it is 

 doubtful whether he had the real costatum of Nyst. The species 

 doUfusi rests therefore upon Koenen's description only. 



D. dufresnii Deshayes, 1825, Mem. Soc. Hist. Nat. Paris, Vol. ii, 

 p. 361, pi. xvii, fig. 18. 



Pliocene f "Marcigny en Borgogne," France. 



D. DUPLEX Defrance, 1819. Diet. Sci. Nat., Vol. xiii, p. 71. Fig- 

 ured in Deshayes, Descr. Anim. s. Vert. Bassin Paris, Vol. ii, pi. 1, 

 figs. 36-39. 



D. bicarinatum Deshayes, 1826. Mem. Soc. Hist. Nat. Paris, 

 Vol. ii, p. 364, pi. xviii, figs. 16-17. 



Eoceyie of Paris Basin. 



Type of the section Lohantale Cossraann. 



D. ENTALiOPSis Sharp & Pilsbry, n. n. 



Entaliopsis anyvulata Newton & Harris, Proc. Malac. Soc. Lond., 

 i, p. 67, pi. 6, f. 1. Not D. annulatum Gmel., or Meyer, nor Entalis 

 annulata Tate. 



Eocene, London Clay, Portsmoidh, etc. 



D. entaloides Fleming, 1825. Edinburgh Phil. Jnl., Vol. xii, 

 p. 240. New name for D. entalis f Sowb., Min. Conch., i, pi. 70, f. 3. 

 Hordwell Cliffs and Stubbington, England. 

 See Searles Wood, Crag Moll., i, p. 189, who considers the speci- 

 mens of doubtful identity, probably having lost the outer coat. 



D. eugenii Dall, 1892. Trans. Wagner Free Inst. Sci., Vol. iii, 

 p. 438, 442. 



Eocene, Prairie Creek, Ala. 



