28 Geological Survey of Alabama. 



VOLUTA SHOWALTERI, n. sp. PI. 3, fig. 14. 



Shell oval, oblong ; whorls five ; spire blunted ; surface smooth and 

 shining; lines of growth hardly perceptible ; suture moderately impressed. 



Body whorl and next succeeding shouldered, bearing thereon numerous 

 small tubercles ; above the shoulder they are concave. 



Aperture two-thirds the length of the shell ; columella four plated 

 the upper one transverse, the middle ones oblique and larger. Outer lip 

 smooth. 



Locality. Matthews' Landing, Ala. 



This species is a true Volute, and belongs to the section Vespertilio 

 Klein Rare. 



Named in honor of Dr. E. R. Sho waiter, of Point Clear, Ala. 



MITRA HATCHETIGBEENSIS, n. sp. PL 6, fig. 3. 



Narrow fusiform ; whorls about ten ; suture impressed ; nucleus smooth ; 

 upper whorls longitudinally ribbed, carinate at their center and tubercu- 

 lated ; the body whorl slightly concave above, with transverse tubercles ; 

 whole surface covered with fine, revolving lines. 



Aperture narrow nearly half the length of the shell; outer lip smooth ; 

 columella straight, with three nearly equal oblique plaits. 



Locality. Hatchetigbee Bluif, Ala. 



ANCILLARIA EXPANSA, n. sp. PL 5, fig. 11. 



Shell large, ovate, flattened above ; whorls about seven , spire moderate ; 

 the youngest whorls encircled by a row of tubercles ; suture impressed, 

 covered with a thin callus. Upper whorls and the upper third of the body 

 whorl flattened, then rather abruptly rounded and regularly diminishing 

 toward the base, where it is bounded by a large basal groove. 



Aperture oblong-ovate; outer lip thick, a callosity at the posterior; 

 columella smooth, covered with callus, and somewhat twisted. No um- 

 bilicus ; no sulcus visible. 



Locality. Lisbon, Ala. 



Faint traces of revolving color lines remain. 



EXPLERITOMA, nov. gen. 



"Shell rounded-elliptical ; suture linear ; whorls few ; a ; all sulcus on 

 the basal part of the body whorl ; base canaliculate. 



Aperture either filled in or contracted to half the original size by 



