230 Paleontology of new jerseV. 



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 striae, 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. odolirata Conrad (Jom-. Acad. Nat. Sci., 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, 1 885, p. 153, PI. in. 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 striae, as well as 

 in the form of the volutions, it is quite, dissimilar. 



Formation and locality : In the upper layers of the Upper Grreen Marls, 

 at Shark River, New Jersey. Collection Am. Mus. Nat. Hist. 



TURRITELLID^. 



Genus MESALIA Gray. 



Mesalia elongata, n. sp. 



Plate XXXIV, Figs. 13-15. 



Shell attaining a very respectable size, slender, elongated, many 

 whorl ed, the number unknown, but certainly twelve or more, the rate of 

 increase in lateral dimensions very moderate; volutions rounded, with only 



