NEW OR LITTLE KNOWN TERTIARY MOLLUSCA 

 FROM ALABAMA AND TEXAS. 



By 



T. H. Aldrich. 



The fossils described in this paper were obtained by the writer 

 between the 3'ears 18S7 and 1889, and the plates and most of the 

 descriptions were prepared for publication early in 1S90. The 

 material, however, was never published, and since then several of 

 the forms illustrated have been described by others. A large 

 number of the species are from the Eocene of Alabama. They 

 do not by any means exhaust the subject as the writer still has a 

 large number of new species from the prolific strata of Alabama 

 and adjoining states. 



Through the kindness of Professor Gilbert D. Harris of Cornell 

 Universit}' the writer is now enabled to publish the following de- 

 S(:riptions. 



All the types of the species herein described are in ni}- collection 

 unless otherwise stated. 



SCAPHOPODA . 



DENTALIUM . 

 Dcntalium iiiultainntlatinii., nov. sp. PI. i, fig. 3. 



Shell strongly arcuate, transversely striated or ringed, posterior 

 end entire ; anterior, oblique ; section oval ; substance of shell thin 

 at the anterior end, thickened 2:^osteriorly. 



Locality. — Gregg's Landing, Ala. 



This species is beautifulh^ marked with close-set anntilations 

 which seem to be slightly oblique to the axis. All the specimens 

 found, over a dozen in number, are silicified, some showing the 

 rings strongly, others rather faintly. The posterior orifice is al- 

 most circular in section. 



Dentaliuni w/r/'f.y/r/a Heilprin. PI. i, fig. 6. 



This figure is given to show the fo: m of the slit. Perfect spec- 

 imens are extremely rare. 



/.^m///r.— Wood's Bluff, Ala. 



