^3 



AI.DRICH, EOCKNK M0I.I.USCA 



13 



nodular at intersections. Two close set spirals border the suture 

 above and below same ; suture channelled ; the last whorl car- 

 ries about 10 widely spaced spirals, raised and nodular with con- 

 cave spaces between. Outer lip thickened with the spirals ex- 

 tending over same, denticulated ; inner lip enameled with the 

 spirals showing through the same. Canal very short ending in 

 a semicircular opening. Length 12+ mm. Two specimens ob- 

 tained. 



Locality. — Lisbon, Ala. 



Type. — My cabinet. 



Olivella semilignitica, n. sp. PI. i. Figs. 27, 28. 



Shell small, whorls six, four smooth ; the fourth and subse- 

 quent ones bounded by a raised band just below the suture ; apex 

 blunt, body whorl showing impressed lines of growth ; aperture 

 as in the genus. Length 5^ mm. 



Locality. — Clark County, Ala. Woods Bluff horizon. 



Type. —Ala. Museum of Nat. History. 



Remarks. — The sutural callosity pronounced on the last 

 whorl only. Differs from O. viediavia Harris in being smaller, 

 more blunt, with fewer folds on the columella, and by a raised 

 sutural band. 



Gilbertia esteilensis, n. sp. PI. 2. Figs. 6,^. 



Shell globular, whorls three ; the first embryonic ; the sec- 

 ond spirally striated but very narrow ; the third very globose 

 and spirally striated ; outer lip thickened and broadly reflected ; 

 a single tooth projecting into the aperture from it ; inner lip 

 thickened with a broad spatulate tooth above, and two prominent 

 teeth near the base ; the outer lip partially covering the second 

 whorl. Under a glass the striae show that they are pitted as in 

 ActcEon. Height 2^ mm. ; breadth 2 mm. 



Locality. — Sucarnoochee beds, 3 miles south of Estella, Ala. 



Type. — Ala. State Museum, University, Ala. 



Cancellaria GiSberti, n. sp. PI. i. Fig. 29. 



Shell with seven whorls remaining ; the spire is damaged ; 

 cancellated ; suture deeply impressed and constricted, especially 



