FAUNA OF OETHAULAX PUGNAX ZONE. 137 



Oligocene of the Tampa silex beds at Ballast Point, Tampa Bay, 

 Florida, and of the BoAvden marl of Jamaica, West Indies. Dall, 

 Henderson, and Simpson. U. S. Nat. Miis. No. 157639. 



Genus PHACOIDES Blainville. 



Phacoides Blainville, Man. Malac, vol. 1, p. 540, 1825. Sole example, 



Lucina jamaicensis Lamarck. 

 Lucina Lamarck, Syst. An. .s. Vert, p. 124, 1801; not of Lamarck, Prodr. 



1799. 

 Phacoides Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1359. 1903. 



PHACOIDES DOMINGENSIS Dall. 



Plate 23, fig. 9. 



Phacoides domingensis Dall. Trans. Wagner Inst., vol. 3, pt. 6. p. 1363, pi. 

 50, fig. 11, 1903. 



Oligocene of the Tampa silex beds at Ballast Point, Tampa Bay, 

 Florida; of the Bowden marl of Jamaica, West Indies; and of the 

 same horizon on the island in Lake Henriquillo, Santo Domingo. 

 U. S. Nat. Mus. No. 165199. 



This is the Oligocene precursor of the recent P. pectinatus Gmelin 

 {P. jamaicensis Lamarck) and has been identified with the latter by 

 Gabb and Giippy. It is, however, smaller, more inflated, with the 

 notch in front of the anterior dorsal area more indented and angu- 

 lar, the concentric lamellation more distant and more evenly spaced, 

 and the posterior dorsal area shorter in proportion and more tri- 

 angular. 



Subgenus HERE Gabb. 



Here Gabb, Pal. Cal., vol. 2, pt. 1, p. 29, 1866; pt. 2, p. 100, 1869. Type, 



Lucina richthofeni Gabb, Pal. Cal., vol. 2. pt. 1, p. 29, 1866.— Dall, 



Trans. Wagner Inst, vol. 3, pt 6, p. 1361, 1903. 

 Linga De Gregorto, Bull. Soc. Malac. Ital., vol. 10, p. 217. 1885. Type, 



Lucina columbeUa Lamarck. 

 Cardiolucina Sacco, Moll. Terz. Piem. e Lig., vol. 29, p. 89. 1901. Type. 



Lucina agassisii Michaux. 



PHACOIDES (HERE) WACISSANUS Dall. 

 Plate 23, fig. 12. 



Oligocene of the Tampa silex beds at Ballast Point, Tampa Bay, 

 and of the limestone at Wacissa, Jefferson County, Florida. U. S. 

 Nat. Mus. No. 165200. 



Eather common at Ballast Point. 



