FAUNA OF OETHAULAX PUGNAX ZONE. 145 



CARDIUM (TRIGONIOCARDIA) BERBERUM, new species. 



Cardnim (Trigoniocardia) alicula (part) Dall, Trans. Wagner Inst, vol. 

 3, pt. 5, p. 1103, pi. 48, fig. 5, 1900 (not pi. 40, fig. 12). 



Oligocene of Tampa silex beds and of the lower bed at Alum 

 Bluff, Florida, and of the Chipola River marl, Calhoim County, 

 Florida. U. S. Nat. Mus. No. 166113. 



"Vnien first described it was thought that the Ballast Point speci- 

 men of C. alicula was worn and that its differences from the Chipola 

 form were due to erosion. The recovery of a well-preserved valve 

 from the silex beds, together with specimens of the Chipola form, 

 has enabled a more exact comparison to be made, which shows that 

 the form from the Chipola marl beds is distinct. It may be recog- 

 nized by its more narrow form and by the very conspicuous 

 denticulation of the margin of the truncated end of the valves. 

 C. alicula, so far as Ivnown, is confined to the Ballast Point horizon, 

 but the present species is present also at Chipola. The Ballast Point 

 specimens are U. S. Nat. Mus. No. 166113. 



Family VENERIIDAE. 



Genus DOSINIA Scopoli. 



Dosinia Scopoli, Intr. ad Hist. Nat., p. 399, 1777. Type, Le dosin 

 Adanson, =Dosinia africana Hanley. 



Artfiemis Oken. Lelub. der Naturg., p. 229. 1815. Venus exoleta Linnaeus. 



Artemis Conrad, Fos. Tert. Form., p. 20, 1832. 



Arctoe Risso, Eur. Merid., vol. 4. p. 361, 1826. Venus exoleta Linnaeus. 



Exoleta Brown, 111. Conch. Gt. Brit., pi. 20. figs. 2, 3, 1827. Venus exo- 

 leta Linnaeus. 



Cerana Gistel, Naturg. Thierr., p. 8, 1848. 



AmpMtJiaea Leach, Syn. Brit, Moll., p. 312, 1852. 



Dosinia Deshayes, Cat. Brit. Mus., p. 5, 1853.— Dall, Trans. Wagner Inst., 

 vol. 3, pt. 6, p. 1226, 1903 ; not Dosinia Gray, 1838. 



Section DOSINIDIA Dall. 



Dosinidia Dall, Proc. U. S. Nat. Mus., vol. 26, No. 1312, p. 347, 1902. 

 Type, Venus concentrica Born; Trans. Wagner Inst., vol. 3, pt. 6, p. 

 1229, 1909. 



DOSINIA (DOSINIDIA) CHIPOLANA Dall. 



Plate 24, fig. 10. 



Dosinia (Dosinddia) chipolana Dall, Trans. Wagner Inst., vol. 3, pt 6, 

 p. 1229, pi. 54. fig. 4, 1903. 



Oligocene of the Tampa silex beds at Ballast Point, Tampa Bay ; 

 and of the Chipola marl, near the county bridge, Chipola River, 

 Calhoun County, Florida. U. S. Nat. Mus. No. 214408. 

 54907°— Bull. 90—15 10 



