NO. 2162. FLINT RIVER OLIOOCENE FOSSILS— DALL. 513 



strongly twisted; the specimens do not show the aperture. Height 

 of 10 whorls as figm-ed, 46; of the ninth whorl, 5.5; diameter of ninth 

 whorl, 19; maximum diameter of specimen (fig. 9), 24; of (decollate) 

 apex, 4 mm. 



Locality. — Station 7074, at Hale landing on the west bank of 

 Fhnt River, 7 miles southeast of Bainbridge, Decatur County, Georgia, 

 in coralhferous chert; Vaughan, Cooke, and Mansfield, 1914. U. S. 

 Nat. Mus. Cat. No. 166733. 



A sHght variation in the strength of the spiral bands in front of the 

 broad presutural band is visible in some of the specimens when the 

 first and fourth of the four anterior spirals may both be stronger than 

 the included pair. A mold of 16 whorls measures — length, 77, and 

 maximum diameter, 27 mm. The base is convex and smooth with 

 a pillar like that of C. mascotianum. Another base measures 32 mm. 

 in diameter. 



CERITHIUM VAUGHANI, new species. 



Plate 87, fig. 8. 



Shell large, solid, flat sided, conic, the cast as figured showing part 

 of five whorls; suture distmct, not channeled; whorls flat, spirally 

 sculptured, the sculpture comprising in front of the suture a conspic- 

 uous row of beadlike nodules with about equal interspaces, on the 

 last whorl about 26 in number; in front of this three slightly 

 undulated fine spiral threads with wider subequal interspaces; be- 

 yond these a slightly more prominent and more distinctly undulated 

 cord, with a spiral groove in front of it and between it and the sharp 

 edge of tlie slightly convex nearly smooth base, on the edge of which 

 the preceding sutures are laid; base sculptured only with faint lines 

 of growth, the form of which indicates that the basal lip of the aper- 

 ture was sharply and roundly produced with a narrow and deep 

 acutely angular notch at the peripherj' of the base. There are no 

 indications on the cast of axial sculpture unless the undulations of 

 the sphals be so construed. Height of four whorls, 31; diameter of 

 the earliest of these at the posterior suture, 14; diameter of base of 

 last whorl, 25 mm. The aperture and canal are wanting in the mold. 



Locality. —Stsition 7074, on the west bank of Flint Eiver, 7 miles 

 southeast of Bainbridge, Decatur County, Georgia, at Hale landing, 

 in coralliferous chert; Vaughan, Cooke, and Mansfield, 1914. U. S. 

 Nat. Mus. Cat. No. 166734. 



CERITHIUM COOKEI, new species. 



Plate 87, fig. 11. 



Shell of moderate size, slender, acute, of about 10 regularly en- 

 larging whorls; suture distinct, an elevated spiral cord in front of it 

 giving a channeled effect; whorls moderately convex; sculpture 

 36399°— Proc.N.M. vol.51— 16 33 



