CEPHALOPODA OF THE CRETACEOUS MARLS. 261 
Genus SCAPHITES Parkinson. 
SCAPHITES NODOSUS. 
Plate xiv. Figs. 13, 14. 
Scaphites (Ammonites?) nodosus, Owen: Geo’. Surv., Iowa, Wis., and Minn., Dp. 
580, tab. 8, Fig. 4. 
Scaphites nodosus (Owen) Gabb: Synopsis, p. 33; Meek & Hayden, Proc. Acad. 
Nat. Sci., Phila., vol. 12, p. 420; Meek, Check List Cret., p. 24; Invert. 
Paleont. U. S. Geol. Surv. Terr., vol. 9, p. 426, and varieties; Whittf., 
Paleont. Black Hills of Dakota, p. 440, Pl. xu, Figs. 1-3. 
A fragment of the outer chamber of a Scaphites, which presents all 
the features of S. nodosus Owen, comes to me among the specimens from the 
Acad. Nat. Sci, Phila. The specimen is without label of any kind, and is 
associated in the tray with S. hippocrepis. The fragment bears every lith- 
ological evidence of being from the green sands of New Jersey, and from 
the Lower Beds. It is the lower end of the outer chamber from near the 
last septum; having a little of the imprint of the convolutions of it near the 
lateral margin, and continues to a little beyond the commencement of the 
outer geniculation. It has a lateral diameter of 12 inches and a dorso- 
ventral diameter of 12 inches from the back to the line of the horizontal 
portion of the volution. The side is flattened and the back rounded; the 
latter part marked by small transverse furrows which arch shghtly forward 
in crossing the shell, and are arranged so as to bring about five ridges with 
their furrows within the space of half an inch in length on the middle of 
the back. The side is marked by two lines of nodes, one at the lower 
angle of the volution, and the other a short distance below the ventral line. 
The last are inconspicuous, while the former are very strong, from three to 
four in an inch space, and those on the horizontal portion transverse and 
much larger; the others gradually growing smaller along the geniculation 
toward the aperture. The side between the lower line of nodes and the 
ventral margin is marked by strong transverse ridges, arising one from each 
of the lower lines of nodes, but in some cases two of them unite at the 
upper node, forming only one from that point to the ventral line; septa of 
course unknown from the specimen. 
The fragment gives evidence of having attained a size seldom exceeded 
by the species at its localities in the Black Hills of Dakota, where it is quite 
