66 AMERICAN JOURNAL 



N. Integra, Conrad. — PL 3, fig. 5. 



Description. — Ovate; spire conical; whorls convex; body 

 whorl ventricose; aperture elliptical, nearly half the shell's 

 length ; columella thick and reflexed, but without a promi- 

 nent callus. 



Buccinum integrum, Conrad. — Proceed. National Institution, 

 p. 194. 



Variety, ovata, Conrad. — PI. 3, fig. 4. (Proceed. Acad. Nat. 

 Sciences, 1862, p. 287.) 



Locality. — Calvert Cliffs, Md. 

 N. subcylindrica, Conrad. 



Description. — Ovately turrited, sub-cylindrical ; body whorl 

 slightly contracted ; base with revolving lines ; summits of 

 the whorls slightly flattened or sub-scalariform. 



This species differs from N. quadrata, in being without re- 

 volving lines at base, without a revolving ridge below the su- 

 ture, and in having the whorls only slightly flattened at sum- 

 mit. These four species have been determined by a compari- 

 son of the young shells of each form. 



VOLUTID^. 



VOLUTIFUSUS, Conrad. 



Description. — ■ Fusiform ; body whorl finely striated or 

 smooth, with the exception of the shoulder, which is some- 

 times tuberculated ; columella plaited, folds 2 to 3, sometimes 

 very prominent, oblique; apex papillated; initial whorl acute, 

 sub-spiral, narrow ; beak produced, recurved or sinuous. 



This genus, so long confounded with Voluta, is remarkably 

 characteristic of Miocene strata in Europe and America. Its 

 narrow base and recurved beak distinguish it from the former. 

 The species are more variable and difficult to distinguish than 

 those of Voluta. The only recent form with which they 

 might be regarded as congeneric is Voluta dubia, Broderip. 

 The species in this country are: — V. Trenholmii, Tuomey and 

 Holmes; V. obtusa, Emmons ; V. solitaria, Conrad; V.muta- 

 bilis, Conrad, and V. typus, Conrad. Those of Europe: — V. 

 Lamberti, Sowerby ; V. Tarbelliana, Grateloup ; V. auris- 

 leporis, (Sowerby,) Grat. There is no true Voluta in the Ter- 

 tiary formations of North America. The recent genus is al- 

 most exclusively limited to Australia, Southern Africa, and 

 the Indian Ocean. V. Junonia (genus Scaphella, Swainson,) 

 is the only one of the living Volutidse on the United States 

 coast. It inhabits the waters of the kej^s near Tampa Bay, 



