— 5U — 



base, substance of the shell thick; spire elevated, pointed, 

 whorls four rounded, columella ivith two large folds, mouth 

 small; outer lip very thick and minutely crenulatedwithin 

 (Isaac Lea). — Long. 3 mill. ; diam. 2 1/2 mill. [ex icône). 



Loc. Eocène moyen. Alabama. 



45. UiNGicuLA VARIA, Gabb. 



Ring, varia, Gabb, Geological Survey of California (Pa- 

 lœonlologie) vol. T, p. il2, pi. xxix, 

 fig. 222, a, b, 1864, et vol. Il, p. 231, 

 1869. 



Shell small, elongate-ovoid, spire high ; whorls six 

 slightly coiivex ; suture well-marked ; body ivhorl broadly 

 and regularly convex. Aperture wide, acute behind, nar- 

 rowed in front, and with a deep, oblique notch. Outer lip 

 nearly simple, the margine being not twice as thick as the 

 shell behind it, and very narrow; inner lip covered with 

 a small, circumscribed callus, bearing two small acute 

 folds anterioriy. Surface variable, sometimes almost per- 

 fectly smooth and polished, at other times ornamented by 

 sharp, impressed Unes ^ and instill other spécimens hoving 

 square ribs of variable width, with the Unes of groivth 

 strongly developed in the interspaces, and represented on 

 the surface of the ribs by shallow undulations. (Gabb). — 

 Long. 12 7nilL; diam. 7 mill. (ex icône). 



Coquille petite, allongée, ovoïde ; spire haute ; six tours 

 légèrement convexes, suture marquée ; le dernier tour lar- 

 gement et régulièrement convexe. Ouverture large, acu- 

 minée en arrière, étroite en avant et avec une échancrure 

 profonde et oblique. La lèvre externe presque simple, le 

 bord, n'ayant guère que deux fois l'épaisseur de la coquille, 

 est très-élroit ; la lèvre interne couverte d'une callosité 



