268 PALEONTOLOGY O^ NEW JERSEY. 



are found to present the small compound divisions seen in the larger speci- 

 mens, although not so extreme. There can, therefore, be no real specific 

 relation between the two in this respect, notwithstanding the great external 

 resemblance. In the septa it more closely resembles ^S*. Jiippocrepis De Kay, 

 but if the diagram be compared with that of that one, it will be seen to be 

 fundamentally so different that it could not be developed into it, besides 

 the tube of this does not ^^'i(len laterally on the outer chamber as does that 

 one, neither is the ventral line of the horizontal portion widened as it is in 

 S. Mppocrepis. 



Formation and local It y : The specimen comes to me associated S. Jiippo- 

 crepis in the same tray, all of which are marked on the label ' ' Cret. N. J. ; " 

 but the specimen of that species figured by Dr. Morton in his Synopsis, 

 which is one of them, came from the deep cut of the Chesapeake and Dela- 

 ware Canal, in Delaware, and as this is closely like it in lithological char- 

 acter, it probably came from the same locality. Collection of the Acad. 

 Nat. Sci., Phila. 



Genus TURRILITES Lamarck, 



TtJRRILITES PAUPER, n. Sp. 



Plate XLV, Figs. 1-5. 



A single fragment of a Turrilites, consisting of one and one-third volu- 

 tions of a species with a very rapidly ascending spire, has been observed 

 among the New Jersey fossils. The coils of the spire are in close contact 

 and the volutions are higher than wide, and show in the cast a moderately 

 wide umbilical opening. The upper edge of the volution . is angular where 

 it unites with the one above, and within the angle the surface is concave 

 where it has been in contact with the base of the coil above. The rest of 

 the surface is rounded, and covered by oblique, bifurcating, or duplicating 

 vertical folds or ridges, and is also marked by two lines of nodes, one at 

 about the middle of the volution and another near the lower part. The 

 nodes occur on almost every alternate ridge, though not invariably so, 

 and those of the upper line of nodes are not on the same ridge as the 

 lower line. The ridges are strongly directed forward as they cross the 

 volution from above to the lower side of the volution, and are visible even 

 within the umbilicus, although faintly so. 



