Aldrich, Eocene Fossils 



Cerithiopsis greggiensis n. sp. 



Plate III, fig. 5 



Shell small ; whorls rather rapidly expanding ; ornament- 

 ed with three rows of tubercles which do not coalesce either 

 spirally or axially as in some specimens of the genus ; en- 

 tire surface covered with fine, close-set, spiral lines ; suture 

 deep ; base with spiral lines, some coarser than others ; col- 

 umella smooth ; spiral lines superimposed upon the other or- 

 namentation ; row of tubercles just below and bounding the 

 suture composed of smaller and more closely set ones than 

 in the other two rows. The specimen is fragmentary. 



Breadth of body- whorl 3 mm. 



Gregg's Landing, Alabama River, Ala. 



Retusa claibornensis, n. sp. 



Plate II, fig. 7 



Shell small, showing lines of growth, not polished ; with- 

 out revolving striae ; spire sunken ; edge of the pit rounded 

 over, aperture longer than the body of the shell, narrow above, 

 widening below ;. outer lip sharp, simple, straight, rounded 

 below, pillar twisted, ridged and somewhat reflected. 



Length 2.5 mm. 



Claiborne, Ala.; in the sand bed. 



Odostomia (Pyrgulina) claibornensis, n. sp. 

 Plate IV, fig. 1 



Shell elongate-ovate ; nuclear whorls obliquely immersed 

 in the first of the post-nuclear turns ; post-nuclear whorls well 

 rounded, narrowly shouldered at the summit, marked by feeble, 

 slightly protractive, axial ribs which are best developed near 

 the summit and gradually decrease in size as they approach 

 the suture ; of these ribs 20 occur on the first and second, 

 and 26 upon the penultimate turn. In addition to the axial 



