GASTEROPODA OF THE EOCENE MABLS. 229 
spiral striae, which is not one of Onustus, but a common one of the other 
genus, while the figure given by the author most nearly resembles a speci- 
men of Architectonica. The species as known from the casts may be char- 
acterized as follows: Broad conical, the surface of the volutions flattened 
in the direction of the spire, about five in number, flattened below and 
acutely angular on the edge. Under surface of the shell very broadly 
umbilicate, apparently exposing all the volutions in the cavity, their inner 
margin rapidly sloping and giving to the whorl an irregular quadrangular 
section. Surface of the cast marked by several spiral lines, and in some 
cases the outer one bordered by a distinct elevated marginal band; under 
surface marked by distinct transverse lines which combine near the inner 
edge to form a series of somewhat transverse nodes along the margin. 
The upper surface appears to have been granulose, judging from many 
of the casts and imprints of the surface, which leaves one strongly impressed 
with the feeling that the shells which made them were specifically identical 
with Architectonica (Solarium) elaborata Conrad, from the sands of Clai- 
borne, Alabama. I can not, however, find any evidence of spiral lines on 
the base of ‘the volutions, and the umbilicus has been very much larger in 
proportion, being about half the width of the shell, whereas in that one it 
is only about one-third of the whole width. 
Formation and locality: In the upper layer of the Upper Green Marls, 
at Shark River, and Farmingdale, New Jersey. Collections at Rutgers 
College and Am. Mus. Nat. Hist. 
SCALARITD 2. 
Genus SCALARIA Lamarck. 
ScALARIA TENUILIRATA, N. Sp. 
Plate xxxiv, Figs. 10-12. 
Shell above a medium size, reaching 13 inches in length in the best 
preserved matrix examined. Spire elevated, the apical angle measuring less 
than 30°. Whorlsten or more in the perfect shell, eight showing in the matrix 
