TJie Tertiary Faima of Nczvton and IVautubbcc, Miss. 41 



the Southern Eocene. Two distant deep notches on the convex 

 side, and two less distant emarginations on the concave side of the 

 shell divide the margin of the elliptical aperture into four append- 

 ages, of which the two small opposite ones are equal, the two 

 larger ones, however, very unequal. It may be that this form 

 represents the aperture of the preceding species, of which we have 

 no example. If, however, the form should prove to be a new 

 species we propose the name Caditliis Nciotonciisis for it. 



Fissiirclla altior, n. sp. 



Plate II. Figure 16, i6(?, 16//. 



Height two thirds of the length of the aperture. Fissure on 

 the apex, nearly circular. Surface covered by alternating, radiat- 

 ing and revolving ribs. The crossing points of the larger ribs are 

 mostly nodulous and scaly. 

 ■ Wautubbee, Newton. 



The type specimen is from Wautubbee. Fissiirella Claibor- 

 ticnsis Lea is lower, has an oblong and less central fissure, a differ- 

 ent sculpture and a different inside. 



Solar iimi clc^^aiis Lea var. modest 11 /ii, n. var. 



.Plate 11, Figure 6, 6a. 



Like Solarium elegans Lea from Claiborne, but without orna- 

 mentation, the row of tubercles along the suture excepted. 

 Wautubbee. 



Siiilaria [Opalia) aUntcsta, n. sp. 



Plate II. Figure 7. 



Whorls sessile, rather gradually diminishing in size, covered 

 by lamellar transverse ribs, which are continuous along the whorls. 

 Newton. 

 Opalia scssilis Conr. from Claiborne has revolving lines. 



Scalaria Ncwtoiicnsis, n. sp. 



Plate 11. Figure 8. 



Whorls regularly rounded, gradually diminishing in size. 

 They are covered by very fine revolving lines, which on the 

 middle of the whorls are arranged in bands, about five in number. 



