212 



PROCEEDINGS OF THE ACADEMY OF 



interior; plait on the columella acute, bounded on either side by a furrow- 

 Length 5-J inches ; width 2f inches. 



Locality. Natural Well, Dauphin Co., N. C. 



FASCIOLARIDJE1 



LIROSOMA, Conrad. 



L. curvirostra. Subfusiform ; volutions 6; spire prominent; ribs rounded, 

 revolving, six on the sides of the two larger whorls of the spire, and one on 

 the flat upper surface ; about 21 on the body whorl with a fine intermediate 

 line ; surface of the shell finely wrinkled longitudinally ; aperture patulous ; 

 base of columella rounded ; fold obsolete ; beak long and twisted. 



Locality. North Carolina ? 



A larger species than Lj. snlcosa, and differing in having a longer and 

 twisted beak, more prominent and acute spire, and in wanting the longitu- 

 dinal furrow or coarse lines, &c. 



ERYCINELLA, Conrad. 



E. ovalis, Conrad. Having obtained several specimens of this Miocene 

 fossil since the description was first published, I find, on comparison with 

 the English shell sent me by S. V. Wood, that it is a distinct species from the 

 latter. 



Mr. Stimpson also made the comparison in my presence, and came to the 

 same conclusion. The error, therefore, in the Monograph of the Crag Mol- 

 lusca is mine. 



CTPRINIDM. 



CYPRIMERIA. 



Lentiform ; hinge of right valve broad, with a bifid oblique cardinal tooth 

 under the apex, and two oblique acute anterior teeth, with an intermediate 

 pit for the reception of the tooth in the opposite valve. 



Cytherea excavata, Morton. 



Only one valve has been obtained showing the hinge, and the exterior 

 markings, which consist of very fine concentric lines on the umbo and wrin- 

 kled lines of growth on the other parts. There is no cartilage pit. Behind 

 the bifid tooth is a slightly raised plate rugoso-striate. The muscular im- 

 pression unknown. Found at Arneytown, N. J., in Cretaceous marl. 



Cyprimeria excavata. 



[Sept. 



