62 BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



fascicle well marked. Height 28, maximum diameter 15, aperture 

 20 mm. 



Oligocene of the Chipola River marls near the county bridge 

 (station 2212), U. S. Nat. Mus. No. 114343; also in the Tampa silex 

 beds? 



Fragments were found at Ballast Point, Avhich were supposed to 

 belong to this species, but were subsequently mislaid. It is probably 

 the first American fossil species of the genus. 



Genus CONOMITRA Conrad. 



Conoimtra Conrad, Amer. Jouru. Conch., vol. 1, p. 25, Feb., 1S65; first 

 species, Mitra fusoicles Lea, Contr. Geol., p. 169, pi. 6, fig. 176, 1S33. 

 Eocene. 



This genus was named, but not diagnosed, three species mentioned, 

 but no type selected, C. fusoides was selected by Tryon, Str. and 

 Syst. Conch., vol. 2, p. 170, 1883. 



CONOMITRA STAMINEA Conrad. 



Plate 10, fig. 2. 



Mitra staminea Conbad, Journ. Acad. Nat. Sci., Pliila, ser. 2, vol. 1, p. 120, 



pi. 12, fig. 4, Aug. 1848. 

 Mitra viclcsbicrgensis Conrad, Jouru. Acad. Nat. Sci., Pliila., ser. 2, vol. 1, 



p. 120. 

 Conomitra angulata Heilprin, Trans. Wagner Inst., vol. 1, p. 110, pi. 15, 



fig. 47, 18.87. 

 Conomitra staminea Daxl, Trans. Wagner Inst., vol. 3, pt. 1, p. 94, pi. 4, 



fig. 2, 1890. 



Oligocene of Vicksburg, Mississippi; of the Tampa silex beds at 

 Ballast Point, and at Six Mile Run, near Orient station, northeast 

 from Tampa, and in the overlying Orbitolite bed ; also in the Chipola 

 marl of the Chipola River, northwest Florida; Burns, Dall and 

 others. U. S. Nat. Mus. No. 165069. 



An extremely similar recent species C. hlakeana Dall, has been 

 dredged in deep water in the Antilles. 



Family TURBINELLIDAE. 



Genus XANCUS Boiten. 



Xancus BoLTEN, Mus. Boltenianum, p. 134, 1798. Type, Voluta pyrum 



Gmelin. 

 TurUneUa Lamarck, Prodrome, p. 73, 1799. Type Voluta pyrum Linnaeus. 



Bolten's name is derived from the East Indian appellation of 

 Chank, or Siank shell, given to the typical species. 



