dAN 9 tR94 



The Nautilus. 



Vol. VII. JANUARY, 1894. No. 9. 



NEW TERTIARY FOSSILS FROM RED BLUFF, MISSISSIPPI. 



BY T. H. AI.DRICH. 



The fossil-bearing stratum designated by Dr. E. W. Hilgard as 

 the " Red Bluff group," occurs in Wayne County, Mississippi, near 

 Red Bluff station, and is exposed on the banks of the Chickasawharg 

 River. The fossiliferous stratum is four feet thick and contains 

 beautifully preserved specimens imbedded in a greenish clay. 

 Through the kindness of Prof. W. H. Dall I have had an oppor- 

 tunity to examine the collections of the National Museum, which 

 were obtained here by Mr. F. Burns and others and with a series 

 in my own cabinet have been enabled to list 135 species from this 

 bed. Of these 26 are peculiar ; 25 are found also in the beds at 

 Jackson, Miss. ; 54 occur also at Vicksburg, and 30 are also com- 

 mon to Jackson and Vicksburg. This bed, therefore, should be 

 classed with the Vicksburg series. The following are described as 

 new: 

 Mitra lintoidea n. sp. PI. 4, fig. 1. 



Shell fusiform, whorls nine, somewhat turrited, densely but 

 coarsely longitudinally ribbed, a transverse impressed line behind 

 the suture gives the upper whorls the appearance of being beaded ; 

 aperture narrow, elongate; outer lip sharp, slightly incurved, 

 striated within, labium four plaited ; canal open, rather short 

 curved, a number of impressed lines showing upon the lower part 

 of body whorl. Alt. 27 mm. ; diam. 8 mm. 



This species differs from Fusimitra cellulifera Con. by its lack of 



