66 PROCEEDINGS OF THE ACADEMY OF [1895. 



Cedar Creek, southeast corner of Wheelock League, Robertson Co., 

 Tex. 



Geological horizon. — Lower Claiborne Eocene. 



Type. — Texas State Museum. 



Cancellaria penrosei nov. sp. PI. 6, fig. 4. 



Specific characterization. — Size and general form as indicated by 

 the figure; whorls 5; 1, 2, 2? smooth; 3, 4 cancellated by about 

 18 sharp ribs over which pass 5 spiral lines, the uppermost on the 

 humeral angle and some little distance above the others; body whorl 

 with about eighteen costal and twelve revolving lines, the uppermost 

 of which, on the humeral angle is separated from the next below by 

 a double space; aperture with two columellar folds and about six 

 labral crenulse; umbilicus moderate. Surface not polished as in the 

 two above-described species. 



Localities. — Smithville, Bastrop Co. ; Dr. Williams' quarry, R. 

 Stephenson's Headright, Brazos Co., Tex. 



Geological liorizon.— Lower Claiborne Eocene. 



Type. — Texas State Museum. 



Cancellaria bastropensis nov. sp. PI. 6, fig. 5. 



Specific characterization. — Size and general form as shown in the 

 figure; whorls 7; nuclear whorls 2?, of which two are smooth, and 

 the last half finely cancellated ; 4, 5, 6 somewhat irregularly cos- 

 tate, about ten costse on the penultimate whorl; spiral striae few and 

 strong on the sides of the whorls, but becoming more closely set and 

 finer on the subsutural region ; body whorl with irregular, obtuse 

 costie crossed by about fourteen spiral lines, strong medially but de- 

 creasing in size towards the suture; labral dentes six on a raised 

 ridge; columella with two distinct folds and a rudimentary third be- 

 low ; umbilicus rudimentary. 



Locality. — Smithville, Bastrop Co., Tex. 



Geological horizon. — Lower Claiborne Eocene. 



Type. — Texas State Museum. 



Cancellaria ulmula nov. sp. PI. 6, fig. 6. 



Specific characteristics. — Size and general form as indicated by the 

 figure; whorls 4; 1, 2 smooth; 3 with seven spiral stria? ; body whorl 

 with about eighteen strong revolving lines and an equal number of 

 intercalated fine stria?, lines of growth prominent; columella with 



