MIOCENE MOLLUSCA AND CRUSTACEA. 109 



of figures only, but with some doubt. On comparison with authentic spec- 

 imens of that species it differs materially in the dentitions of the columellar 

 lip, that one having only very slight crenulations on the lower end, and 

 only one, the lowest, that might be called a ridge. The crenulations of the 

 outer lip are also stronger and less numerous. 



Formation and locality: The specimens used are from the gray mica- 

 ceous marls of the Miocene at Jericho, N. J., and belong to the National 

 Museum collection.s. Dr. Emmons's specimens were from Cape Fear River, 

 North Carolina. 



Family OLIVID^E. 



Genus OLIVA Brug.=:DACTYLUS Klein. 



Oliva Carolinensis. 



PI. XIX, fig. 8. 



Oliva Utterata Courad (not Lauiiirck) : Am. Jour. Arts and Sci., vol. 41, p. 345, PI. ii, 



fig. 1; Emmons, Geol. North Carolina, 1852, p. 259, fig. 130. 



Strephona Utterata Tuom. and Holmes: Plioc. Foss. Soutli Carolina, p. 140, PI. xxviii, 



fig. 13. 

 Dactylus Carolinensis Conrad: Proc. Acad. Nat. Sci. Phila., 1862, p. 584. 



" Cyliudi-ical; spire short, conical; whorls concave or angulated; colu- 

 mella strongly plaited throughout ; substance of shell very thick at base." 



A fragment of the outer volution of a two-thirds grown specimen of an 

 Olive occurs among the collections, which I suppose belongs to the above- 

 named species. The shell, being from a partially grown specimen, is not so 

 thickened as it might have become at an older stage, and in its present con- 

 dition shows no features that miglit not readily exist on specimens of Oliva 

 Utterata. In fact I can see no reason for separating the Miocene form found 

 in the more Southern States from the shells living along the Atlantic coast. 



Locality: The fragment comes from the Miocene marls at Jericho, 

 N. J., and belong to the collections of the National Museuiiau 



