MIOCENE MOLLUSCA AND CRUSTACEA. 107 
and the spiral lines more distinctly elevated, while the aperture bears a 
much greater proportion to the length of the shell than in that one. In this 
one it is about two-fifths of the whole length, and in that one between one- 
third and one-fourth of the whole length. And the texture of the shell is 
here finer and more beautiful. I have frequently seen specimens of a shell 
quite similar to this among collections from the extreme southern coast and 
the West Indian seas, but usually about twice its size. I can now find no 
specimens of these for comparison; nor do I know any name for the recent 
species, but think it very probable they may be nearly or quite identical. 
Formation and locality: From the gray micaceous marls of the Miocene, 
at Shiloh, N. J. In the collection of the National Museum. 
Genus BUCCINANOPS D’Orb. 
BUCCINANOPS VARIABILIS 0. Sp. 
Pl. xvu, figs. 13-18. 
Shell rather small, not exceeding five-eighths of an inch in total length; 
the body of a somewhat subcylindrical form, sometimes wider below than 
above, and sometimes the reverse; spire short-obtuse, or subturreted; volu- 
tions of the spire round scalariform, with deep distinct sutures, the apical 
ones often quite pointed and attenuated, with a small, rounded, mammillary 
nucleus; aperture from half to three-fourths as long as the shell, according 
to the length of the spire, channeled at each extremity and constricted 
just below the suture on the body whorl, leaving the upper edge of the 
volution protruding fold-like, the lip expanding again below; inner lip 
extending upon the inner volution, forming a callosity which is thickened 
above, bordering the posterior canal; lower canal channeling the base of 
the columella within. Surface smooth, polished when entire, but generally 
eroded, showing under a glass fine lines of growth. 
I had been inelined to consider this shell identical with Mr. Conrad’s 
Bulliopsis quadrata, from the inspection of his figure and description given 
inthe Am. Jour. Conch., vol. 2, p. 65, Pl. 1, fig. 1; but upon examining his 
original figure in the Jour. Acad. Nat. Sci., Ist ser., vol. 6, Pl. rx, fig. 16, I 
have come to the conclusion that it would be better to risk a new name as 
