135 Miocene Fossixs, Oi^sson 15 



Scala dupliniana, n. sp., Plate 1, Fig. 14 



Shell small, slender ; whorls 3+, regularly convex and with 

 deep sutures between ; varices about 1 1 , on the body- whorl be- 

 ing low, flat and each provided with a small hook above ; spiral 

 sculpture between the varices of two kinds, a primary set of 

 strong, raised spirals and a secondary intermediate spiral be- 

 tween each two primaries ; on the whorls of the spire, the pri- 

 mary spirals number about 10, smaller more irregular on the 

 base of the body-whorl ; in addition, the space between the pri- 

 mary spirals is sculptured with equal, transverse, raised lines, of 

 the same strength as the secondary, thereby producing a micro- 

 scopic reticulation ; a narrow band bordering the suture, is with- 

 out the spiral sculpture ; mouth round, thickened by the last 

 varix. 



Length of specimen 5.5. mm ( 3 zvhorls) 



Breadth 3 mm. 

 Distinguished by its low flat varices, hooked above, by 

 the spiral sculpture and microscopic reticulation of the spaces 

 between the primary spirals. 



Duplin formation ; Natural Well, N. C. 



Scala sheldoni, n. sp., Plate 1, Fig's 9, 15 



Shell small, slender, with 3 +, regularly convex whorls ; 

 varices 14, rather heavy, rounded and composed of several, flar- 

 ing laminae ; varices alternating in their position on the ad- 

 joining whorls ; interspaces smooth or with obscure growth lines; 

 mouth round, with a heavy outer lip. 



Length of broken specimen 5.5 mm. 



This well-marked species may be distinguished by its 

 well-rounded whorls and heavy lamellated varices. On the ear- 

 lier spire-whorls, the varices are somewhat irregular in their 

 outlines and erose. 



This neat little species is named for Dr. Pearl Sheldon of 



