99 MOLLUSCA OF THE GULF OF MEXICO 67 



Knapp's wells, Terrebonne Parish, No. 1 (?), 1600- 1700 

 feet, No. 2, 151 9-1542, No. 3 at 570-700, 880-900, 1330-1375, 

 1400- 1440, 1700-1712 feet, 

 efegans Conrad, Proc. A. N. S. Phila., 1, p. 325, 1843, (as Ar- 

 temis)) Fos. Medial Tert., p. 67, pi. 38, f. 1, 1845 ; Am. 

 Jour. Sci., 2d Ser., II, p. 393, 1846 ; Dall, Tr. W. I. S. 3, 

 p. 123 1, 1903; Vaughan, Publ. 133, Carn. Inst., p. 171, 19 10. 



concentrica Reeve, Conch. Icon. 6, pi. 2, f. 1, 1850 ; Tuomey 

 and Holmes, Plio. Fos. S. C, p. 82, pi. 21, fig. 7, '55. 

 Not concentrica Born, 1780. 



transversa Emmons, 1858 ; intermedia Conrad, 1863. 

 Distribution. — Hatteras toYucatan. Miocene to Recent. Gulf 

 coast. — Tampa, Fla. (Conrad's locality); Texas. Pleis- 

 tocene : Osprey and Labelle, Fla. Pliocene : Caloosa- 

 hatchie and Shell Creek. 



Genus TRAf^SENNELLA Dall 

 conradina Dall, Proc. U. S. N. M., 6, p. 340, '83 ; Idem, 24, p. 

 509, pi. 31, f. 5, 7, 1902 ; Vanatta, Proc. A. N. S. Phila., 

 P- 757 , '03, (as Meretrix); Dall, Tr. W. I. S., 3, pp. 

 1240, 1616, '03. 



Distribution. — Hatteras to Key West, 0.31 fms. Pleistocene 



to Recent. Gulf coast. — Cedar Kej^s, (type locality), St. 



St. Joseph's and St. Andrew's Baj^s, Crooked Island, St. 



Mark's, W. Fla. Pleistocene : Osprey, Fla. 

 Genus GAFRARSUSV1 Bolten 

 (Gouidia) cerina C. B. Adams, Proc. Bost. Soc, N. H., p. 9. 



1845, (as Thetis)-, Cat. Jamaican Sh., p. 29, '47 ; Dall, B. 



M. C. Z. 9, p. 130, '81 ; Idem, 12, p. 263, pi. 7, f. 4 a-b, 



'86 ; Bull. 37, p. 48, pi. 7, f. 4 a-b, '89 ; Proc. U. S. N. M., 



26, p. 369, 1903. 

 Distribution. — Hatteras to Brazil, 0-229 fms. Gulf coast. — 



Charlotte Harbor, Fla., 13 fms. 



Genus MACROCALLISTA Meek 

 nimbosa Solander, Portland Cat., p. 175, 1786, (as Venus); Whit- 

 field and Ho vey, Bull. Am. Mus. Nat. Hist., 11, p. 462, 



