FAUNA OF ORTHAULAX PUGNAX ZONE. 63 



XANCUS POLYGONATUS Heilprin. 



TurUnella polygonata Heilprin, Trans. Wagner Inst., vol. 1, p. 108, pi. 15, 

 fig. 43, 1887.— Dall, Trans. Wagner Inst., vol. 3, pt. 1, p. 97, 1890. 



Oligocene of the Tampa silex beds and of the lower bed at Alum 

 Bluil, Chattahoochee Eiver, Florida, Heilprin, Dall, and others. 

 U. S. Nat. Mils. No. 165071. 



This species was described from a very imperfect young specimen 

 from Tampa and the description somewhat enlarged from fragments 

 from Alum Bluff. A. well-preserved specimen is still a desideratum. 



Genus VASUM Bolten. 



Yasum Bolten, Mus. Boltenianiim, p. 56, 179S. First species, Valuta capitel- 

 lum Gmelin. — Link, Beschr. Rostock Samml., vol. 3, p. 119, 1807. 



Cynodonta Schumacher, Essal, p. 73, 1817. 



Cynodona Schumacher, Essai, p. 141, 1817. Sole example, Voluta ceramica 

 Linnaeus. 



This genus is represented by some very remarkable species in the 

 Tertiary of the Coastal Plain of the United States. 



VASUM SUBCAPITELLUM Heilprtn. 

 Plate 7, fig. 2. 



Vasum subcapitelluiii Heilprin, Trans. Wagner Inst., vol. 1, p. 109, pi. 15, 

 fig. 4, 1887.— Dall, Trans. Wagner Inst., vol. 3, pt. 1, p. 99, pi. 4, fig. 

 12, 1890. 



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

 Burns, Dall, Post and others. U. S. Nat. Mus. No. 165072. 



This species should be compared with the TurUnellus aedi-flcatus 

 Guppy, which I have not had an opportunity of studying. 



VASUM ENGONATUM Dall. 

 Plate 11, figs. 2, 3. 



Vasum haitense Sowerby var. engonatum Dall, Trans. Wagner Inst., vol. 3. 

 pt. 1, p. 100, 1890. 



Oligocene of the lower bed at Alum Bluff, Chattahoochee Eiver, 

 and of the Chipola marl, Chipola River, at the county bridge, for- 

 merly Bailey's Ferry, west Florida; of AVliite Beach, Little Sarasota 

 Bay-^ and Ballast Point, Tampa Bay, south Florida; Burns, Dall, 

 Willcox, and Post. U. S. Nat. Mus. No. 165070. 



An examination of the Haitian species leads to the conclusion that 

 it is distinct from the present one. 



