78 BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



carinate, the whorl in front rapidly, flattishly attenuated; varices 

 thin, recurved, between the shoulder and the canal with eight or 

 nine crenulations, between which and the margin of the aperture the 

 front of the varix is somewhat convex and smooth ; aperture rounded- 

 ovate, with an entire thin, projecting free margin; canal closed, 

 short, stout, wide, slightly curved to the right and backward; 

 siphonal fasciole with three projecting imbrications; the umbilical 

 region deeply grooved, but not perforate. Length of shell 10.5, of 

 last whorl 8, of the aperture 2.7, maximum diameter 6.5 mm. 



Tampa silex beds, at Ballast Point, Tampa Bay, Florida. 



One specimen in the Post collection, U. S. Nat. Mus. No. 165090. 



Genus CORALLIOPHILA Adams. 



CoraUiophila H. and A. Adams, Gen. Rec. Moll, vol. 1, p. 135, Sept. 1853. 

 No type mentioned ; Pyrula neritoidea Lamarck, selected by Tryon. 



CORALLIOPHILA MAGNA Dall. 

 Plate 7, fig. 7 ; plate 10. fig. 6. 



CoralUopMla magna Dall, Trans. Wagner Inst, vol. 3, pt 1, p. 155, pi. 11, 

 figs. 11, 12, 1890. 



Tampa silex beds, at Ballast Point, Tampa Bay, Florida; rather 

 common, and reaching an unusual size for the genus. U. S. Nat. 

 Mus. No. 165091. 



Genus RAPANA Schumacher. 



Rapana Schumacher, Essai, p. 214, 1817. Type, Pyrula hezoar Lamarck. 



RAPANA TAMPAENSIS Dall. 

 Plate 13, fig. 8. 



Rapana tampaensis Dall, Trans. Wagner Inst., vol. 3, pt. 1, p. 153, 1890; 



pt. 2, p. 244, pi. 20, fig. 14 (var.?). 1892. 

 Ecphora quadricostata var. Maetin, Pal. Maryland, Miocene, 1904, p. 211, 



Not of Say, Journ. Acad. Nat. Sci., Phila., vol. 4, p. 127, Nov. 1824 (as 



Fusus). 



Tampa silex beds at Ballast Point, Tampa Bay, Florida ; Dall and 

 Post. U. S. Nat. Mus. No. 165096. 



The reception of several perfectly preserved specimens enables 

 me to give a satisfactory figure of this pretty little species. The 

 form figured on plate 20 of the Wagner Memoir as a possible variety, 

 from Church Hill, Maryland,^ is probably a different species, which 

 might be called Rapana ecclesiastica. The reference to Ecphora is 

 mitigated by the imperfect condition of my original specimens. 



1 Martin, Paleontology Maryland, 1904, pi. 52, fig. 9. 



