Contributions to tlje Eocene Paleontology of ^labanja and 



Mississippi, 



BY OTTO MEYER, PH. D. 



In the following a number of new .or unh'gured species of invertebrates 

 of the Eocene Tertiary of Alabama and Mississippi are described and 

 figured. A very few known species are refigured for some special reason. 

 Those descriptions and figures which belong to Plate I were made in the 

 year 1884, but the publication of this plate has been delayed by various 

 reasons. I am under obligation to Mr. T. H. Aldrich and Dr. E. A. 

 Smith for the present opportunity to publish this paper. The type speci- 

 mens are in my collection. In the following descriptions of univalves, 

 the term ' ' longitudinal " means parallel to the suture or helicoid axis of 

 the shell, "transverse" indicates the direction rectangular to it. 



DENTALIUM LEAI MEYER. PI. 1, figs. 2, 2a. Am. Jour, tiei., 1885, 

 XXIX., p. 462. 



? Dentalium areiformis, Con. Am. Jour. Sei., I, 2d ser., 1846, p. 212. 

 PI. 1, fig. 3. 



Substance of the shell thick, slightly curved, smooth; section and 

 aperture circular; smaller termination notched in the direction of the 

 curvature ; interiorly with a tube. 



Locality. Claiborne, Ala. 



Three specimens have the incision of the smaller termination, but only 

 one of them is perfect enough to show the interior tube also. A young 

 specimen approaches in its aperture the following species : 



The smooth species of Dentalium have to be distinguished by their 



