360 DESCRIPTIONS OF NEW SPECIES OF FOSSILS 



STROMBUS, Linn. 

 S. BiTUBERCULATUS, Lam., A. S. Y. (Desh. Ed.), Y. 9, 690. 

 Not rare. 



S. PUGiLis, Linn., Syst. Nat. (12 Ed.), p. 1209. 



CYPR^A, Linn. 

 C. ciNEREA, Gmel., Syst. Nat., p. 3402. 



Very common. Living now in the West Indies. 



C. CARNEOLA, Linn., Syst. Nat., 1114. 



My friend Mr. Roberts, who has probably paid more attention to this genus 

 than anybody else in Philadelphia, kindly assisted me in identifying these 

 Cyprseas. Despite the absence of color, the most important specific character 

 here, I am satisfied that the determinations are correct. Now living in the 

 Pacific. Abundant also in the deep railroad cutting so often mentioned. 



TRIYIA, Gray. 

 T. PEDicuLus, Linn., Syst. Nat. (12 Ed.), p. 1180. 



CYPHOMA, Bolt. 

 C. GiBBOSA, Linn. 



Bulla gibbosa, Linn., Syst. Nat., p. 1183. . 



Ovula id., Lam., A. S. Yert. 



But two specimens were found; the'polish is as perfectly preserved as in life. 



CERITHIUM, Brug. 

 C. MoENENSis, Gabb., n. s., PI. 46, fig. 49. 



Shell subulate, robust, spire high, whorls numerous ; suture impressed, irregu- 

 lar. Surface marked by from eight to ten large irregular nodes on the upper part 

 of each whorl adjoining the suture, making the suture undulated and extending 

 as ribs over the upper whorls. On the body volution these tubercles disappear 

 about the middle. On the same volution, near the inner lip, is a varix-like thick- 

 ening, prolonged with the canal; over the whole surface are small, closely placed, 

 and numerous revolving lines. Aperture rounded, constricted both above and 

 below; canal narrow, short, and sharply deflected. Inner lip thickened, bearing a 

 strong posterior tooth and ending in a sharp fold which extends to the end of the 

 canal ; outer lip acute, projecting below, and finely striated internally. 



Nearest to C. Guinaicum, Phil., as figured by Sowerby, Thesaurus, PI. 181, fig. 

 127, but is more slender, higher, the outer lip less produced anteriorly, has a 



