606 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



Cooke, and Mansfield, 1914. U. S. Nat. Mus. Cat. No. 166784. Also 

 in the Orthaulax j^ugnax zone, at Ballast Point, Tampa Bay, Florida; 

 Dall, 1885. U. S. Nat. Mus. Cat. No. 112054. 



The figure does not show as clearly as might be wished the strength 

 of the sculpture on the upper part of the spire, the curvature of the 

 canal, or its constriction at the base of the whorl. 



MUREX RUFIRUPICOLUS, new species. 



Plate 86, fig. 8. 



Specimen represented by an internal cast with a slightly defective 

 apex ; fusiform with over four whorls, a long straight canal, a rounded 

 aperture, the outer lip expanded, thickened, crenulate, with a promi- 

 nent guttered spine at the shoulder, a large dentiform callosity inter- 

 nally just m front of the suture, and six prominent internal lirations 

 diminishing anteriorly, in front of the groove at the shoulder. There 

 appear to have been two feeble varices or thickenings visible on the 

 internal cast on each of the antecedent whorls, and an expansion of 

 the outer lip continued some distance down on the right margin of 

 the canal. Length of the cast as figured, 42; maximum diameter of 

 the last whorl, 19 mm. 



Locality. — Station 7096, on the west bank of Flint River, 7 miles 

 above Bainbridge, Decatur County, Georgia, at Red Bluff; Vaughan, 

 Cooke, and Mansfield, 1914. U. S. Nat. Mus. Cat. No. 166725. 



Ordinarily an internal cast is of little value in determining a species 

 of gastropod, but in this case the imprint is so complete that distinc- 

 tive characters separating this form from any other now known from 

 the Gulf Coast Oligocene, are present, 



EPITONIUM(?) DUBIOSUM, new species. 



Plate 88, fig. 3. 



Shell minute, only the last whorl accessible, the whorl with a cir- 

 cular cross section, smooth except for thin, sharp lamellae, of which 

 there appear to bo at least 30 on the (last) whorl; aperture slightly 

 expanded with a sharp margin, apparently entire; umbihcus deep, 

 circular, rather large for the shell. Maximum diameter of whorl, 

 1.5; minimum diameter, 1; height, 0.75 mm. 



Locality. — Station 7074, on the west bank of the Flint River, 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. 166726. 



This fragment may be the basal whorl of a minute Epitonium, or 

 possibly a Trochoid allied to Vetulonia. 



The impossibility of detaching the matrix renders a final decision 

 impracticable; but, in any case, the characteristics are such that a 

 complete specimen could not fail to be recognized. If we were per- 



