Geological Survey of Alabama. 19 



MUREX SIMPLEX, n. sp. PL 5, fig. 8. 



Shell short, stout; whorls probably five; suture deeply impressed; 

 varices numerous, very large and broadly rounded, terminating above 

 near the suture in sharp points ; seven on the body whorl, numerous 

 coarse raised revolving lines cover the whorls ; aperture small, ellipti- 

 cal, terminating anteriorly in a nearly closed canal ; outer lip thickened 

 and crenate within ; three folds appear upon the columella. 



Locality. Bryan's Ferry, Miss.; Vicksburg Group. 



This type specimen has retained its former apertures, which give to the 

 shell a broad termination and a false umbilicus. 



TROPHON GRACILIS, n. sp. PL 5, fig. 6. 



Shell acuminate, whorls, ten, rounded ; spine high, with three embry- 

 onic whorls, the first two smooth, the next showing longitudinal varices, 

 the balance with numerous (in the type nine) strong varices, which are, 

 when perfect, thin, fringing and sigmoid ; six or more revolving lines cut 

 the edge of the varices into an equal number of crenulations, these re- 

 volving lines being strongest at their intersecting points ; aperture 

 ovate, terminating in a narrow canal which turns strongly to the left and 

 slightly upward ; outer lip sharp, thickened and crenulated within ; 

 three slight protuberances on the anterior part of the columella near the 

 canal. 



Locality. Lower Bed, Wood's Bluff, Ala. 



Only two specimens found. This species is more acuminate and has a 

 shorter canal than is usual in living forms. 



TROPHON CAUDATOIDES, n. sp. PL 6, fig. 4. 



Shell with numerous varices; whorls seven, uppermost two smooth, 

 the others angulated by the variceal nodes and crossed by a few revolving 

 lines, which are rather coarse and somewhat alternate ; one to four thick- 

 ened lamelliform varices on different specimens at irregular distances 

 apart. Aperture ovate ; outer lip expanded and crenate within ; col- 

 umella smooth, twisted below ; canal rather abruptly turned to the left. 



Locality. Hatchetigbee Bluff, Ala. 



PSEUDOLIVA UNICARINATA, n. Sp. PL 5, fig. 17. 



Shell broadly ovate, whorls seven, sutural line wavy ; spine sharp, the 

 upper part rising suddenly from the flattened body whorl ; nucleus com- 

 posed of three smooth embryonic whorls. Body whorl shouldered, bear- 



