170 SYSTEMATIC PALEONTOLOGY 



whorl thick, polished; spire short, obtuse, about i or 4 of the length 

 of the shell; suture deeply canaliculate; columella plaited throughout. 



Conrad's description of 0. carolinensis is as follows : " Cylindrical ; 

 spire short, conical; whorls concave or angulated; columella strongly 

 plaited throughout; substance of shell very thick at base." Whitfield's 

 specimen is too fragmentary to determine the species with certainty. 



Length, 28 mm.; diameter, 11 mm. 



Occurrence. — St. Mary's Formation. St. Mary's River (fide Say). 

 Choptank Formation. Greensboro, St. Leonard's Creek. Calvert 

 Formation. Church Hill. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 Philadelphia Academy of jS^atural Sciences. 



Oliva harrisi n. sp. 

 Plate XLIV, Figs. 2, 3. 



OHva literata Harris, 1893, Amer. Jour. Sci., ser. iii, voL xl, p. 34. 

 Not Oliva litterata Lamarck. 



Description. — Shell elliptical, narrow, elongate, fragile; spire high, 

 pointed, about i or -^ the length of the shell; body whorl gently inflated 

 above, sides uniformly rounded : lower end of the columella strongly 

 callous. 



This species differs from 0. litterata in having a higher spire, in being 

 proportionally narrower throughout, and in having the greatest infla- 

 tion of the body whorl at a greater distance from the suture. 



Length, 37 mm. ; diameter, 11.5 mm. 



Occurrence. — Calvert Formation. Plum Point. 



Collections. — Maryland Geological Survey, U. S. jSTational Museum. 



Family MARGINELLID/E. 



Genus MARGINELLA Lamarck. 



Marginella minuta Pfeiffer. 

 Plate XLIV, Fig. 4. 



3farginella minuta Pfeifier, 1840, Archiv fiir Naturgeschichte, toL vii, p. 2.59. 

 Marginella cojiulus H. 0. Lea, 1843, New Fossil Shells from the Tertiary of Vir- 

 ginia (Abst.),* p. 12. 



* As all the forms in which this paper appeared are not generally known it may 

 be well to call attention to the matter here. 



A paper entitled '■'■ Descriptio7i of some new Fossil Shells from the Tertiary of Peters- 



