51 MOLLUSCA OF THE GULF OF MEXICO 1 9 



zil. Upper Miocene to Recent. Gulf coast. — Recent: 

 Calhoun County, Florida ; Horn Island, Mississippi ; 

 Cameron, Point au Fer, Louisiana ; Galveston, Corpus 

 Christi, Texas. 

 Pleistocene : New Orleans pumping station No. 7, Grand 

 Chenier, Knapp's wells, Terrebonne Parish, No. i at 

 2000-2150 (?), No. 2 at 1434-1519, No. 3 at 570-700, 

 Beaumont Pretoleum and Liquid Fuel Co.'s well No. i, 

 Saratoga, Texas, at 705 feet ; Weiss No. i, Saratoga, 

 (depth not recorded). Upper Miocene : Galveston artes- 

 ian well at 2433-2920 feet (Harris). 

 (Cunearca) chemnitzi Philippi 



Area Chemnitzii Philippi, Zeitschr. fiir Malakozoologie, vol. 

 8, p. 50, 1851. 



{Noetia) Orbignyi (Kobelt) Ball, Bull. 37, U. S. Nat. Mus., 

 p. 40, 1889. 



{Oinearca) Chemriitzi Ball, Trans. Wagner Inst. Sci., vol. 

 3, pt. 4, pp. 636, 659, 1898/ Sheldon, Palaeont. Amer., 

 vol. I, p. 60, pi. 15, figs. 3, 4, 1916. 

 Bistribution.— Texas and West Florida to St. Thomas (Ball). 



(Argina) campechensis Gmelin 



Area campechensis Gmelin, Syst. Nat., vol. 6, p. 3312, 1792. 



campeehensis Billwn, Bescr. Cat. Rec. Shells, vol. i, p. 238, 

 1817. 



pexata Say, Jour. Acad. Nat. Sci., Phila., 2, p. 268, 1822. 



americana Gray, Wood's Index Test. Suppl., pi. 2, Area, 

 fig. I, 1828; Reeve, Conch. Icon., Area, fig. 21, 1844; 

 Hilgard, House of Rep. Ex. Boc. i, pt. 2, p. 887, 1878 ; 

 Holmes, Post-Plio. Fos. S. C, p. 19, pi. 4, figs. 2, 2 «, 

 i860 ; Ball, Bull. 37, U. S. Nat. Mus. p. 40, 1889 ; Sing- 

 ley, Fourth Ann. Rept. Geol. Surv. Texas, p. 325, 1892. 



pexata Gould, Inv. Mass., Binney'sE d., p. 147, fig. 456. 

 1870; Hilgard, loe. eit., p. 887, 1878; Ball, Bull. 37, U. 

 S. Nat. Mus., p. 40, 1889 ; Singley, Fourth Ann. Rept. 

 Geol. Surv. Texas, p. 325, 1892. 



