TRANSACTIONS OF WAGNER 



^ TERTIARY FAUNA OF FLORIDA 



and Holmes under the name of Dosinia concentrica is not the same as the 

 Pleistocene one later identified with it by Holmes. The latter is Dosinia discus 

 Reeve. The young were referred to Dosinia obovata Conrad by Miss Bush in 

 1885, but D. obovata is the young of D. acetabulum Conrad. 



Dosinia (Dosinidia) discus Reeve. 



Artemis concentrica Conrad, Am. Marine Conch., p. 55, pi. xii., 1831 ; Philippi, Abb. und 



Beschr., ii., p. 171, 1844; Conrad, Am. Journ. Sci., 2d Ser., ii., p. 393, 1846. (Not 



Venus concentrica Born.) 

 Cytherea concentrica De Kay, Zool. N. Y., v., p. 216, 1843. 

 Dosinia concentrica Holmes, Post-PL Fos. S. Car., p. 37, pi. vii., fig. 4, i860. 

 Artemis discus Reeve, Conch. Icon., vi., pi. ii., fig. 9, 1850; Conrad, Proc. Acad. Nat. 



Sci. Phila., vi., p. 320, 1853 ; Sowerby, Thes. Conch., ii., p. 657, pi. cxl., fig. 9, 1852. 

 Dosinia discus Deshayes, Cat. Conch. Brit. Mus., p. 10, 1853; Conrad, Proc. Acad. Nat. 



Sci. Phila., vii., p. 30, 1854; Tryon, Am. Marine Conch., p. 161, pi. xxx., fig. 399, 



1873 ; Dall, Bull. 27, U. S. Nat. Mus., p. 56, 1889. 



Pliocene of the Brunswick Canal, Georgia, J. H. Couper; of the Caloosa- 

 hatchie beds on the Myakka and Caloosahatchie Rivers and Shell Creek, 

 Florida ; Pleistocene of South Carolina at Simmons Bluff. Living from Cape 

 May, New Jersey, to Vera Cruz, Mexico, but not authentically identified from 

 any of the Antillean Isands. 



This is the most compressed of our east coast species and is characterized 

 by finer and closer concentric striation and a notably darker coloration of the 

 yellowish-brown periostracum, which is generally shaded in darker and lighter 

 zones. 



Dosinia (Dosinidia) concentrica Born. 

 Venus concentrica {ex parte) Gmelin, Syst. Nat., p. 3286, 1792; Chemnitz, Conch. Cab., 



vii., p. 10, 1784. 

 Venus concentrica Born, Mus. Vindob., p. 71, pi. v., fig. 5, 1780. 

 Venus dilatata Solander, Mus. Calonnianum, p. 48, No. 905, 1797. 



Cytherea (Arthemis) patagonica Philippi, Abb. und Beschr., i., p. 169, pi. ii., fig. i, 1844. 

 Vetius Philippi Orbigny, Voy. Am. Mer., p. 553, 1847. 

 Artemis patagonica Reeve, Conch. Icon., vi., pi. vii., fig. 40. 1850; Sowerby, Thes. Conch., 



ii., p. 657, pi. cxl., fig. 8, 1852. 

 Artemis concentrica Sowerby, Thes. Conch., ii., p. 655, pi. cxl., fig. i, 1852. 

 fArtemis nitens Reeve, Conch. Icon., Artemis, pi. iii., fig. 12, 1850. 

 fArtemis distans Sowerby, Thes. Conch., ii., p. 655, pi. cxl., fig. 3, 1852. 

 Dosinia concentrica H. and A. Adams, Gen. Rec. Moll., ii., p. 431. 1857. 



