230 PALEONTOLOGY OF NEW JERSEY. 
and the apex still imperfect, leaving room for at least two others above 
what is shown. Form of the volution circular, extremely ventricose with 
deep strong suture lines. Aperture apparently circular except on the inner 
side, where it seems to have been very slightly constricted, as seen on the 
internal cast. Volutions crossed by very strong, elevated, and slightly 
recurved vertical, lamellose folds, which have been extended on the top of 
each volution in a short spire, as shown by the matrix (but which can not 
be obtained by gutta-percha from the natural mold). Base of the principal 
volution unknown. The shell is further marked by spiral striz, which are 
exceedingly fine and are gathered into somewhat regular folds on the back 
of the vertical ribs, and also on the intermediate surfaces. 
This species is an exceedingly beautiful one, and has apparently attained 
a rather large size. The base of the shell in the matrix used is destroyed 
to a great extent, but it does not appear to have possessed the spiral ridges 
common to a large group of these shells, consequently we may safely sup- 
pose the axis to have been imperforate. In general appearance it is much 
like S. octolirata Conrad (Jour. Acad. Nat. Sei. Phila., 2d ser., vol. 4, p. 
294), as identified and figured by Mr. T. H. Aldrich in his ‘Notes on 
Tert. Foss.” in the Jour. Cin. Soc. Nat. Hist., July, 1885, p. 153, Pl. m, Fig. 
22, but the apical angle is much greater, the shell having been more robust 
than that one; while in the matter of varices and surface striz, as well as 
in the form of the volutions, it is quite dissimilar. 
Formation and locality: In the upper layers of the Upper Green Marls, 
at Shark River, New Jersey. Collection Am. Mus. Nat. Hist. 
TURRITELLIDZ. 
Genus MESALIA Gray. 
MESALIA ELONGATA, 0. sp. 
Plate xxxIv, Figs. 13-15. 
Shell attaining a very respectable size, slender, elongated, many 
whorled, the number unknown, but certainly twelve or more, the rate of 
increase in lateral dimensions very moderate; volutions rounded, with only 
