53 



MOIXUSCA OF THE GULF OF MEXICO 



21 



(Byssoarca) glomerula Dall, Bull. 37, U. S. Nat. Mus., p. 



42, pi. 8, figs. 9, 9 a, 1889. 

 (Bathyarca) glomerula Dall, Trans. Wagner Inst, Sci., vol. 



3, pt. 4, p. 659, 1898 ; Sheldon, Palseont. Amer., vol. 1, 



p. 64, pi. 16, figs. 4, 5, 1916. 

 Distribution. — Hatteras to St. Vincent, 100 to 683 fms. Gulf 



of Mexico, western Florida region. (Dall). 



(Bathyarca) pectunculoides Scacchi 



Area pectunculoides Scacchi, Not. Conch, foss. Gravina, in 



Ann. Civ. Sicil., vol. 6, p. 82, 1834. 

 pedmiculoides var. orbiculata Dall, Bull. Mus. Comp. Zool., 

 vol. 9, p. 121, 1881 ; Idem, vol. 12, p. 240, pi. 8, fig. 5, 

 1886. 



{Bathyarca) pectunculoides Dall, Trans. Wagner Inst. Sci., 

 vol. 3, pt. 4, pp. 619, 659, 1898 ; Sheldon, Palseont. 

 Amer., vol. 1, p. 65, pi. 16, figs. 9-1 1, 1916. 

 Distribution. — Norway to St. Vincent, 75 to 1568 fms. Vari- 

 ety orbiculata dredged by the Blake in Gulf of Mexico. 



Genus GLYCYMERIS Da Costa 



pectinata Gmelin 



Area pecti?iata Gmelin, Syst. Nat. 6, p. 3313, 1792. 

 Pectu?iculus aratus Conrad, Am. Journ. Sci., vol. 41, p. 346, 



1841 ; Fos. Med. Tert., p. 62, pi. 34, fig. 2, 1845 ; Tuomey 



and Holmes, Pleio. Fos. S. C, p. 50, pi. 17, fig. 6, 1857. 

 pectiniformis Orb., Moll. Cuba, vol. 2, p. 313, 1853 ; (not 



tiniformis Lamarck) . 

 charlestonensis Holmes, Post-Plio. Fos. S. C, p. 16, pi. 3, 



fig. 5, i860. 



pectinatus Dall, Bull. 37, U. S. Nat. Mus., p. 42, 1889. 

 pectinata Dall, Trans. Wag. Inst., vol. 3, pt. 4, p. 612, 1898. 

 Distribution. — Hatteras to Nicaragua, 2-175 fms. Miocene to 



Recent. Gulf Coast. — Recent : west Florida, Texas. 



Pleistocene : Knapp's No. 3 well, Terrebonne Parish, 670, 



700-780 feet ; New Orleans Gymnasium well 1200 feet. 



Pliocene : Caloosahatchie, Fla, 



