INSTITUTE OF SCIENCE, PHILADELPHIA. 2$ 



Terebra (Acus) protexta Conrad. 



Cerithimn protextum Conrad, Proc. Acad. Nat. Sci. Phila., iii. p. 26, 1845. Morch, Malak. 



Blatt., xxiii. p. 121, 1877. 

 Acus protextus Dall, Rep. Blake Gastr., pp. 63, 65, 1S89. 



Miocene of the Carolinas and Florida ; Pliocene of South Carolina and 

 Caloosahatchie beds of Florida ; Post-Pliocene of North Carolina and Florida. 

 Recent on the coast of the United States from Cape Hatteras south to Florida 

 and west to Texas, in 2 to 50 fathoms weedy bottom. 



It is almost impossible to separate the varieties of T. protexta, T. coucava, 

 etc., from each other or from the fossil forms previously referred to, when a 

 full series is examined. Thev intercrrade almost without limit. 



Terebra constricta H. C. Lea. 

 T. constricta H. C. Lea, Am. Journ. Sci., xl. p. 100, plate i. figure 18, 1841. 



On an examination of the type of this species from the Claiborne sands, it 

 turns out to be a trilineate Cerithiopsis or Sella, very closely related to S. 

 terebrans C. B. Adams, of the recent fauna. 



Family CONID.F:. 



Genus CONUS Linn6. 



Conus planioeps Heilprin. 



Plate II, figures 5, 5 a. 



Conus plaiiiceps Heilprin, Trans. Wagn. Inst. L p. no, fig. 48. 



This species appears very uniform in its characters, and sufficiently distinct 

 from C. haltensls Sowerby. I have seen no other species from the silex-beds 

 at Tampa, while this is sent from Martin Station, about twelve miles north of 

 Ocala, Florida, by Mr. Willcox, in a silicified rock, apparently referable to the 

 Vicksburg horizon of Upper Eocene age. The Eocene Conns saurldens Con- 

 rad is closely related to this species. 



Conus oruzianus n. s. 

 Plate 5, figure 12. 

 Shell elongate pyriform, thin, deeply spirally sulcated ; whorls ten or 

 twelve, apex acute, arising from a .spire but little elevated, and having its slope 

 concave in profile; sides of the shell with about twenty deep, uniform rounded 

 sulcations, separated by slightly narrower cords ; anteriorly these cords are 

 rounded and finely striated spirally, midway they are a little flattened, and 

 near the spine they are even marked with a shallow median sulcus; the chan- 

 nels are not striate between the cords, or but in the faintest manner ; sides of 

 the shell slightly swelling, falling away toward the spire, which is rounded at 

 the margin, striated with fine distinct threads, and with a narrow striated 



