FAUNA OF ORTHAULAX PUGNAX ZONE. 151 



This is one of the largest and least common of the silex bed fossils, 

 and has the rough area of the hinge, characteristic of the genus, 

 quite small, compared with the Miocene and recent species of which 

 it is one of the precursors. A nearly allied but apparently distinct 

 species is the V. langdoni of the lower bed at Alum Bluff. 



Family TELLINIDAE. 



Genus TELLINA (Linnaeus) Lamarck. 



Tellina (part) Linnaeus, Syst. Nat, ed. 10, p. G74, 1758; ed. 12, p. 1116, 



1767. 

 Tellina Lamarck, Prodrome, p. 84, 1799. Sole example Tellina virgata 



Linnaeus.— Dall, Proc. U. S. Nat. Mus., vol. 23, No. 1210, p. 289, 1900; 



Trans. Wagner lust., vol. 3, pt. 5, p. 1004, 1900. 

 Eutellina Fischer, Man. de Concliyl., p. 1147, 1887. 



Subgenus TELLINA sensu strictu. 



Tellina Dall, Trans. Wagner Inst., vol. 3. pt. 6, p. 1009, 1903. Type, 

 Tellina virgata Linnaeus. 



TELLINA SEGREGATA Dall. 

 Plate 17, fig. 3, 11. 



Tellina scgregata Dall, Trans. Wagner Inst, vol. 3, pt 5. p. 1019, pi. 37, 

 figs. 7, 8, 1900. 



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

 U. S. Nat. Mus. No. 157847. 



This species seems to group with the following form, but the char- 

 acter of the sculpture is quite different. 



TELLINA CHIPOLANA Dall. 

 Plate 22, figs. 1, 2. 



Tellina cMpolana Dall, Trans. Wagner Inst., vol. 3, pt 5, p. 1018, pi. 47, fig. 

 6, 1900. 



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

 (Post) ; of the lower bed at Alum Bluff, Chattahoochee River; and 

 of the Chipola marl, near the county bridge over the Chipola River, 

 Calhoun County, Florida. U. S. Nat. Mus. No. 165219. 



TELLINA DIRA, new species. 



Shell small, thin, posterior end slightly bent to the right, elongate, 

 with beaks slightly behind the middle of the shell ; beaks not promi- 

 nent, minutely projecting, smooth ; remainder of the shell sculptured 

 with low, sharp, elevated lamellae, which are obsolete on the posterior 

 dorsal slope ; the shell shows no radial sculpture ; dorsal slopes about 



