TERTIARY DENTALIUM. 209 



D. MEDIAVIENSE Harris, 1896. Bull. Amer. Palaeont, Vol. i, p. 

 187, pi. 17, fig. 1 (No. 4, p. 73, pi. 7, fig. 1). 



Eocene, Midway stage, Alabama and Mississippi. 



D. MICHELOTTII Hoei'iies, 1856. Foss. Moll. Tertiar Beckens von 

 Wien, p. 654-655, pi. 50, fig. 33. S/.cco, Moll. Terr. Terz. Pie- 

 monte e Liguria, xxii, p. 96, pi. 7, f. 84-86, with "varieties" inter- 

 cosicillata, rotundulina, rotimdosimplex, costulatior, costulatissima 

 Sacco. 



The involved synonymy includes D. pseudosexagonum Bonelli, 

 not Dh, pseudoentalis Sismonda not Lam., lamareki Mayer (in 

 part), 



Miocene of the Vienna Basin and Piedmont. 



D. MICROSTRFA Heilprin, 1880. Proc. Acad. Nat. Sci. Phila., 

 1880,' p. 375, pi. 20, fig. 3. 



Eocene, Lignitic, Woods Bluff, Alabama. 



D. MINUTISTRIATUM Gabh, 1860. Journal Acad. Nat. Sci. Phila. t 

 <2d Ser.), Vol. iv, p. 386, pi. 67, fig. 46. 



Lower Claiborne Eocene of Texas, 



D. MIOCENICUM Michelotti, 1847. Descr. Foss. Terr. Mioc. ItaL 

 Septrion, p. 144-145, pi. 16, fig. 12. Entalis miocenica SACCO, Moll. 

 Terr. Terz. Piern. e Ligur., xxii, p. 108, pi. 9, f. 31-35. 



Loiver Miocene of Piedmont. 

 D. MIOPSEUDO ENTALIS (Sacco), 1897. 



Entalis miopseudoentalis SACC., Moll. Terr. Terz. Piemonte e 

 Liguria, xxii, p. 106, pi. 9, f. 7-11, with var. costatior Sacc. 



Miocene of Piedmont. 

 D. MISSISSIPPIENSE Conrad, 1847. 



D. misxissippensis CONRAD, Proc. Acad. Nat. Sci. Phila., 1846- 

 7, p. 282 ; figured in the Journ. Acad. Nat. Sci. Phila. (2), Vol. i, 

 pi. xi, fig. 1 . 



D. denmtum CONRAD, Amer. Journ. of Conch, i, p. 212, pi. 20> 

 f. 15. 



Oligocene, Vicksburg, Mississippi. 



D. virginiantim CHENU, 111. Conch., i, pi. 4, f. 8, 8a, 8h, unde- 

 scribed, may possibly be this species. D. densatum Conr. (from 

 type) is a fragment of an old individual of Mississippiense. 



D. MONTENSE Briart & Cornet, 1889. Mem. Acad. Roy. de Bel- 

 gique, Vol. Ixvii, p. 60, pi. 24, figs. 12 a-b. 



Uj/per Eocene ofMons. 

 14 



