On the Secondary and Tertiary Formations. 345 



to species formerly described ; the localities visited by Mr. Hodge be- 

 long chiefly to the medial tertiary deposits ; the other formations are 

 the cretaceous and lower tertiary. One of the tertiary localities I no- 

 ticed in Volume xxxix, p. 387, and described some of the shells which 

 occur there, from specimens in the collection of my friend D. B. Smith. 

 The following list of species is made out from his collection. The fos- 

 sils are imbedded in quartzose sand, with a large admixture of commi- 

 nuted shells : 



Natica canrena, Conus adversarius, Mitra Carolinensis, Fulgur exca- 

 vatus, F. contrarius, F. maximus, Cyprea Carolinensis, Crepidula forni- 

 cata, Turritella Mitchelli, Cerithium Carolinensis, Buccinum multiruga- 

 tum, Fasciolaria rhomboidea, Lucina Jamaicensis, Area transversa, 

 Mactra crassidens, Pectunculus quinquerugatus. 



References and descriptions of new species. 

 Oliva. 

 Oliva litterata, Lam. Plate II, fig. 1. 



Buccinum. 

 Buccinum interruptum. Plate II, fig. 2. Elevated, subfusiform, with 

 longitudinal ribs and transverse impressed lines, two below the suture ; 

 middle of the whirls entire, sides flattened, lower half of body whirl 

 with equal prominent lines. 



B. multirugatum. Ovato-conical, with numerous wi-inkled spiral 

 lines, coarser and more distant near the suture and at base of the body 

 whirl ; base bicarinated and subumbicated ; columella with a thick fold 

 at base. Length, 2 inches ; width, 1^ inches : from the collection of 

 D. B. Smith. Locality, Natural well, Duplin Co., N. C. 



Conus. 

 Conus adversarius. Plate II, fig. 3. For description, see Vol. xxxix, 

 p. 388. Mr. Hodge has one dextral .shell, the only one I have seen 

 among eight or ten specimens of the species. 



Cerithium. 

 Cerithium unilineatum. Plate II, fig. 4. Slightly turrited ; volu- 

 tions with each a spiral impressed line above the middle ; space be- 

 tween this line and suture with oblique plica?. 



C. Carolinensis. Subulate ; whirls with impressed spiral lines and 

 numerous acute longitudinal ribs which are dislocated by a sulcus be- 

 low the suture. Length, 2J inches. Resembles C. dislocatum, but is 

 far larger, and has much more numerous and less prominent ribs. 



Mitra. 

 Mitra Carolinensis. Plate II, fig. 5. For description, see Vol. 

 xxxix, p. 387, where it is inadvertently described as a Valuta. 

 Vol. XLi, No. 2.— July-Sept. 1841. 44 



