Bulletin 27 14s 



periphery. 



Named for J. D. Thompson a member of the 2nd Ecphora 

 trip. 



Duplin formation ; Natural Well, N. C. 



Pseudorotella bushi, n. sp., Plate 3, Fig's 5, 6 



Shell small, much depressed, polished, porcellanous ; whorls 

 3, enlarging uniformly ; suture 1st deep and distinct, later be- 

 coming appressed and bordered with an impressed band ; sur- 

 face smooth and shining, with irregular growth lines and general- 

 ly with fairly regular groovings on the periphery, which may ex- 

 tend well up onto the upper surface ; base flattened, with the 

 body-whorl large, and through the spreading of its columellar 

 wall closing the umbilicus or leaving a small perforation ; the 

 umbilical region is outlined by a small ridge or spiral ; base 

 strongly sculptured by close-set growth lines and with fairly 

 even radial grooves, extending over the base and onto the pe- 

 riphery ; mouth round, oblique. 



Greater diameter 1.60, lesser diameter 1.20, height 6 ?nm. 



I am referring to the genus Pseudorotella Fischer, the Mio- 

 cene species described as Tei?wsto?na calvertense Martin and T. 

 vortex Dall. T. vortex is a larger species and perfectly smooth 

 except for the incremental growth lines. T. calvertense of the 

 lower Miocene is more closely allied to bushi, but our shell may 

 be distinguished by the radially grooved periphery and more 

 strongly sculptured base. 



This species is named for Dr. Katherine Bush for her work 

 on the smaller gasteropods of the recent Atlantic fauna. 

 Duplin formation ; Natural Well, N. C. 



Ethaiia alexanderi, n. sp., Plate 3, Fig's n, 12, 13. 



Shell small, solid, porcellanous ; spire low and rounded ; 

 whorls 3, the 1st turn small, the others much larger; suture 

 distinct between the later whorls, indistinct between the earlier, 



