216 PROCEEDINGS OF THE ACADEMY OF [1879. 



ROSTELLARIA, Lam. 

 Rostellaria Whitfieldi, nob. PI. xiii., fig. 14. 



Shell fusiform ; spire tapering, consisting of about nine flattened 

 volutions; bocty-whorl sub-angulate beneath ; columella flexuous, 

 with traces of an obtuse fold ; outer lip with a swollen prominence 

 in the apertural region ; wing ? 



Length 3-4 inches. 



Claiborne, Ala. 



Named in honor of R. P. Whitfield, Esq., the distinguished 

 American paleontologist and colaborer with Prof. James Hall in 

 the great work on the paleontology of the State of New York. 



Two specimens of this species, both unfortunately bereft of 

 their wings, are in possession of the American Museum of Natural 

 History of New York. Their characters are so decidedly at vari- 

 ance with those of any other American Eocene Bostellaria, that 

 we feel no hesitation in applying to them a specific name, although 

 the broken nature of our specimens necessitates an incomplete 

 description. Allied species occur in the London clay and in the 

 Paris basin. 



