344 Fossil and Recent Shells. 



MELONGENA. 



M. alveaia. Shell subglobose, with revolving striae; a few of 

 which are distinct; body whorl with a broad channel above; spire 

 very short, columella callous, profoundly so above; basal emargina- 

 tion profound. Length, one and a half inches. 



JLocality. — Claiborne, Alab. London clay. 



CREPIDULA. 



C lirata. Shell oblique, elevated, conapressed : longitudinally 

 ribbed; beak prominent, incurved, and turned to one side. 

 Locality. — Claiborne, Alab. London clay. 



SOLARIUM. 



1. S. elaboratum. Shell discoid, with numerous revolving cren- 

 ulated striae of different sizes; beneath slightly channeled on the sub- 

 margin, with a few strong grooves; margin of the umbilicus pro- 

 foundly crenulated ; the crenulations extending to the apex ; aper- 

 ture nearly circular. Length, one third of an inch. 



Locality. — Claiborne, Alab. London clay. 



2. (S. cancellatum. Shell elevated, cancellated; volutions an- 

 gular, channeled at the suture; umbilicus cancellated; aperture orbi- 

 cular. Length, one fifth of an inch. 



Locality. — Suffolk, Va. 



SIGARETUS. 



iS. bilix. Shell obliquely oval, convex, with fine crowded striae re- 

 volving in pairs. Length, one third of an inch. 

 Locality. — Claiborne, Alab. London clay. 



TYPHIS. 



T. gracilis. Shell fusiform, elongated, slender, volutions about 

 eight; ribs of the body whorl 4, thickened and slightly reflected ; 

 with two or three arched scales on each; margin of the aperture el- 

 evated but not reflected. Length, one third of an inch. 



Locality. — Claiborne, Alab. London clay. 



2. T. acuticosta. This shell is described by me as a Murex in the 

 Jour. Acad. Nat. Sciences, Vol. 6. 



RECENT SHELLS. 



LUCINA. 



L. Floridana. Shell suborbicular, compressed, with regular con- 

 centric stri«, and covered with a very thin pale brown deciduous epi- 



