76 PROCEEDINGS OF THE ACADEMY OP^ [1899. 



soniau Eocene at Moutgomery, Grant Parish, La., and numerous 

 specimens from Jackson, Miss. 



The types of this and the following variety seem veiy distinct 

 from P. hilll, but among the large series before me are specimens 

 that practically run the three together, P. hilli occupying an inter- 

 mediate position. The type of Phos hilli is from the Jacksonian 

 Eocene at Vince Bluff Saline river, Cleveland Co., Ark. The 

 typical form is also common at Jackson, Miss. 



Phos hilli Harris var. jacksonensis n. var. Plate I, fig. 11. 



The type of this variety may be described as follows: Shell with 

 8 whorls, apex smooth, the following whorl with only oblique ribs 

 that soon assume the general sculpture of the shell, which consists 

 of about 14 longitudinal ribs (on the body and first spiral whorl 

 a number of these are united, forming, wide ribs or varices), these 

 are crossed by prominent revolving ridges (5 on the spirals and 

 about 18 on the body whorl) that form conspicuous nodules, there 

 are also fine alternating revolving raised lines; above the basal 

 fold of the columella a smaller one is present. Length 12 mm., 

 greatest diam. 5 mm. 



Numerous specimens from Jackson, Miss. 



Columbella punctostriata n. sp. Plate II, fig. 4. 



Shell subfusiform, spire prominent (apical whorls wanting), 

 whorls convex, with several varices, reticulated by seven revolving 

 ridges and numerous fine longitudinal ribs ; these become obsolete 

 or Avanting on the body whorl. Anterior half of the body whorl 

 with numerous revolving, punctated strise; aperture narrow, con- 

 tracted, outer lip thick, sinuous, inner margin crenulated with 18 

 teeth-like ridges, inner lip smooth except at the anterior and pos- 

 terior ends, where it is slightly rugose. Length 10 mm. (with 

 apical whorls probably 12), greatest diam. 5 mm. 



One specimen collected by the Avriter from the Lower Claiborne 

 at Berryman's Place, three miles northeast of Alto, Cherokee Co., 

 Texas. 

 Typhis dentatus n. sp. Plate I, fig. 13. 



Shell with seven whorls, including the two smooth apical whorls, 

 each whorl with four varices or ribs, those of the body whorl 

 serrated with six, partly open, teeth-like projections, the one at the 

 shoulder large and irregular, the varices in all cases extend more 



