. 34 



DENTALIUM. 



D. thalloides. PI. 18. fig. 1. ,A 



Shell elongated, slightly curved, with nine distinct longitu- 

 dinal costae, and intermediate smaller ones, the latter gene- 

 rally three in number ; the middle one being the largest. 

 Length 2 inches. 



Locality, Claiborne, Alab. 



Cab. Acad . N. S. 



VOLVARIA. , 



V. galba. PI. 18. fig. 2. 



Shell subcylindrical, with fine transverse obsolete striae : 

 spire umbilicated at base ; umbilicus replaced by an impress- 

 ed }ine. Length J of an inch. 



Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



MITRA. 

 1. M.bolaris. PI. 18. fig. 3. 



Shell subfusiform, transversely striated ; whorls five ; spire 

 rather short, mammillated ; columella with four teeth. Length 

 'about one inch. 



Locality, Claiborne, Alab. 

 f Cab. Acad, N. S. 

 ' 2. M. doliata. PI. 18. fig. 4. 



Shell subturbinate, ventricose, striated towards the base, 

 unarmed ; shoulder rounded ; spire a little elevated, obtuse ; 

 columella five toothed. . Length about one inch. 

 Locality, Claiborne, Alab. 

 Cab. Acad. N. S. 



BUCCINUM. 



" B. sagenum. PI. 18. fig. 5. 



Shell conic-acute, with elevated, distinct, acute costee, about 

 fifteen of which are on the body whorl, and decussated by nu- 

 merous regular, slightly elevated transverse striae ; somewhat 

 indented above* the shoulder : volutions about eight, the four 



[66] 



