248 PALEONTOLOGY OF NEW JERSEY. 
fifth of the distance from the margin of the inclosed volution to the back 
of the shell from the inner edge. Prof. Cope states at the edge of the inner 
fourth. 
The shell substance, some of which remains on the inside of the cast 
and between two of the chambers, has been very thick, more than a six- 
teenth of an inch, and presents an imperfect columnar or prismatic structure 
on the edge. The sides of the cast also show it to have been very heavy 
where the septa have joined the outer shell, as the cast shows the ridges 
and chamfering of the edges when the shell has been removed. Some of 
the cavities left between the filling of chambers also are nearly or quite a 
line in thickness. Longitudinal lines also mark the cast, showing evidence 
of muscular attachment along the sides of the chambers between the 
umbilical cavity and the septal processes or lateral lobes of the septa. 
Mr. Meek refers this species to Conrad’s genus Hercoglossa, which was 
founded upon Nautilus orbiculatus Tuomey. Conrad’s description of the 
genus in the Am. Jour. Conch., vol. 2, p. 101, is as follows: “Nautiloid; 
septa angular and linguiform; apex of the angle, or tongue-shaped lobe, 
not contiguous with the adjacent septum; siphon large or moderate, situated 
within the center, or between the middle and inner margin, and not dorsal 
> Aturia should have 
or funnel-shaped, but tubular and gradually tapering.’ 
a funnel-shaped, dorsal siphon, which this species has not, consequently 
can not be a true Aturia. Dr. Tuomey’s N. orbiculatus, which was Conrad’s 
type of Helicoglossus, is probably at least generically if not specifically 
identical with this, so that this will at least fall under that genus. 
Formation and locality: I think there can be no reasonable doubt of 
the authenticity of the locality of the specimen used and figured, being as 
marked on the label attached: Glassboro, Gloucester County, New Jersey. 
Prof. Cope states under his description that it was found at Heritage’s marl 
pits associated with Terebratula Harlani and Teredo tibialis, which would 
place it in the Middle Marls. There is also in the Academy’s collection parts 
of two chambers of the same species from Vincentown, New Jersey, collected 
by T. M. Bryan, Esq., which would also most probably be from the Middle 
Marls, as both these and the Upper Marls are near together at that point. - 
Another fragment in dark brown material occurs in the tray with the frag- 
ments of Am. telifer, marked simply “N. J.” 
