1895.] NATURAL SCIENCES OF PHILADELPHIA. 67 



two prominent folds on its central portion and a third, rudimentary 

 one below; umbilicus small. 



Locality. Elm Creek, Lee Co., Tex. 



Geological horizon. Lower Claiborne Eocene. 



Type. Texas State Museum. 



Cancellaria ellapsa Con., Amer. Jour. Conch., vol. 1, 1865, p. 212, pi. 21 (not 20), 

 fig. 8. 



This Conrad describes as an Eocene species from Texas, but it 

 proves upon examination to be nothing but " Trichotropis cancellaria 

 Con.," a species described by Conrad from the Ripley Cretaceous beds 

 of Mississippi. The Texas specimen was probably derived from the 

 upper Cretaceous not far below Austin. 



Genus VOLVAKIA. 



Volvaria gabbiana nov. sp. PI. 6, fig. 7. 

 Marginella ( Volvaria} gabbiana Aid., MS., pi. 2, fig. 13. 



Specific characterization. Size and general form as shown by the 

 figure; whorls 3; 1, smooth; 2, spirally striate; body whorl long 

 cylindrical, spirally striate with faint punctations in the striae; 

 labrum sharp-edged ; labium with four basal folds varying in size 

 as follows : at base a moderate sized fold, above, a stronger one, still 

 above, a moderate sized one, and above all, a very faint one. 



Localities. Devil's Eye, Colorado River, Bastrop Co. ; bluff just 

 below the mouth of Alum Creek, Tex. 



Geological horizon. Lower Claiborne Eocene. 



Type. Texas State Museum. 



Genus VOLTJTILITHES. 



Volutilithes dalli nov. sp. PI. 6, fig. 8, a, 



Caricella reticulafaftei\v., non Aid., Proc. Ac. Nat. Sci. Phila., 1890, p. 396. 



Specific characterization. Size and general form as indicated by 

 the figures; whorls about 7; spiral whorls and shoulder of the body 

 whorl generally coarsely cancellated with revolving lines and trans- 

 verse costse; humeral angle of the body whorl often spinose; medial 

 portion of the body whorl with finer but very distinct revolving 

 striae and fine lines of growth; base of body whorl as in other mem- 

 bers of this genus; labrum strongly lirate within; columella with 

 two well-defined oblique plaits and sometimes one or more rudimen- 

 tary ones. 



The amount of reticulation or ornamentation possessed by different 



