﻿Notes on the Tertiary of Alabama and Mississippi. 145 



[The following papers were read at the July meeting of the So- 

 ciety, and are here printed at the special request of the Society] : 



NOTES ON THE TERTIARY OF ALABAMA AND MISSIS- 

 SIPPI, WITH DESCRIPTIONS OF NEW SPECIES. 



By T. H. Aldrich. 



Among a large mass of material collected during the past two 

 years, the following species, principally from Mississippi, are be- 

 lieved to be new. The principal locality, Red Bluff, Miss. , is no 

 doubt a local bed, part of the Vicksburg group ; but it seems to 

 be rich in peculiar forms, besides having a large number of Vicks- 

 burg fossils proper. All are particularly well developed, and in 

 a good state of preservation : 



Solecurtus Vicksburgensis, h. sp. PI. 2, fig. i. Shell, trans- 

 versely-oblong ; surface, obliquely grooved nearly all over; anterior 

 end, smooth ; posterior, with grooves meeting those on the posterior 

 and dorsal margin at an obtuse angle ; angular along the umbonial 

 slope ; anterior, truncated ; posterior, rounded ; ventral part, con- 

 cave, lines of growth showing distinctly ; beak, slightly raised, 

 rounded, striated, on the anterior side of the shell. Two indis- 

 tinct lines run across the center of the shell from the beak to the 

 ventral margin ; posterior tooth in left valve prominent. Height, 

 j^- of an inch ; width, i^. 



Locality, Vicksburg, Miss. 



Only the left valve of the species is known. The interior being 

 filled with matrix, no description can be made. 



Murex (Pteronotus) angelus, n. sp. PI. 2, fig. 2. Shell, 

 oblong, with three spinous varices ; whorls convex, seven ; spire, 

 elevated ; surface, rough, showing three or four revolving lines on 

 the body whorl ; spines, channeled to the tips, nearly closed, 

 small sub-spines between the larger ones ; aperture, oval ; outer lip, 

 ridged; inner lip, reflected; canal, long, longer than the aperture, 

 curving outward. Length, inches; breadth, nearly ^ of an 

 inch. 



Locality, Red Bluff, Miss. 



