FAUNA OF ORTHAULAX PUGNAX ZONE. 85 



CYPRAEA HEILPRINII Dall. 



Plate 3, figs. 2, 14. 



Cypraea heilprinii Dall, Trans. Wagner Inst., vol. 3, pt. 1, p. 166, pi. 11, 

 figs. 2, 2« 1890. . 



Oligocene (Niimmulitic) of Ocala, Florida, and at Ballast Point 

 in the silex beds and overlying " orbitolite bed," Tampa Bay, Florida. 

 U. S. Nat. Mus. No. 112073. 



CYPRAEA BALLISTA, new species. 

 Plate 6, figs. 9, 10, 11. 



Shell small, pyriform, with a slight dimple over the spire, the 

 sides of the base somewhat expanded by callus ; aperture rather wide 

 flexuous, with (on the right side 25 and on the opposite side about 

 20) sharp-edged lirae or denticulations, which do not extend over the 

 base, but on the left side pass deeply into the aperture; these are 

 separated by interspaces of greater width which on the right side 

 are somewhat excavated, on the left side rather less so; posterior 

 sinus curved upward, anterior sinus direct. Length 27, maximum 

 width 19, height IG mm. 



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

 Nat. Mus. No. 165098. 



This form is more attenuated behind and has a flatter base, wider 

 aperture behind, less adjacent teeth, and the anterior sinus less 

 recurved and smaller than in C. heilprinii C. tumulus has the teeth 

 closer together, the base not expanded, and the aperture less flexuous. 

 It is also consistently smaller than C. hallista. 



Family CASSIDIDAE. 



Genus MORUM Bolten. 



Morum Bolten, Mus. Bolt., p. 53, 1798. Sole example, Strombus oniscus 

 Gmelin.— Dall, Prof. Paper No. 59, U. S. Geol. Survey, p. 67, 1909. 



Section HERCXTLEA Hanley- 



HercvXea Hanley. in H. and A. Adams, Gen. Rec. Moll., vol. 2, p. 621, 

 Nov., 1858.— Ball, Prof, paper No. 59, U. S. Geol. Survey, p. 68, 1909. 



MORUM DOMINGENSE Sowerby. 



Plate 12, fig. 28. 



Oniscia doming en sis Sowerby, Quart. Journ. Geol. Soc, London, vol. 6, pt. 

 1, 1849, p. 47, pi. 10, fig. 3 (Santo Domingo). — Heilprin, Trans. Wagner 

 Inst., vol. 1, p. 120, 1886. 



Morum domingemc Gabb, Trans. Amer. Pliilos. Soc, vol. 15, p. 223, 1873. 



LamUdium domingense Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1567, 

 1903. 



Morum (Herculea) domingense Dall, Prof, paper. No. 59, U. S. Geol. Sur- 

 vey, p. 69, 1909. 



