472 
PALAEONTOLOGY OP NEW-YORK. 
Stropfoostylus andrcwsi (n. s.). 
Plate CXYIII. Fig. 2. 
Shell somewhat semiovoid. Spire very slightly elevated above the last 
volution, which is extremely ventricose : aperture subcircular, a little 
higher than wide; peristome very oblique to the axis of the shell, ex¬ 
panding over the inner side of the previous volution, but not continuous 
with the outer edge of the columellar lip, which is angular, the lip 
short, and terminating abruptly below. 
Surface marked by fine equal striae. 
This species differs conspicuously in its low spire, broader aperture, and short 
abruptly terminating pillar-lip, from either of the species in this rock. 
Fig. 2. View of the aperture, columellar lip, etc. 
The figure does not represent the aperture sufficiently circular or high. 
Geological position and locality. In the Oriskany sandstone : Cumberland, Md. 
Flatyceras tortuosum (n. s.). 
Plate CXIII. Fig. 1-5. 
Shell spirally ascending, making a little more than one free volution : 
volutions widely separated, very gradually increasing in size towards 
the aperture, which is scarcely expanded ; peristome very oblique. A 
broad spiral fold sometimes marks the inner side of the spire. 
Surface unknown. 
The specimens are all casts, or preserve a very small portion of the shell, which 
is not sufficiently perfect to show the surface characters. 
This species is closely allied to P. spirale , but does not appear to have had a 
contiguous volution at the apex, nor to be so distinctly spirally plicate; while the 
specimens show no marked expansion at the aperture. 
Fig. 1-5. Views of different individuals (which are more or less perfect), showing a 
gradation in size. 
Geological position and locality. In the Oriskany sandstone : Albany and Scho¬ 
harie counties. 
