114 PALEONTOLOGY OF NEW JERSEY. 
The features of these casts as above described show considerable re- 
semblance, in these specimens, to A. abrupta Conrad, as known in casts from 
Mississippi, but are not sufficiently marked to afford a positive identifica- 
tion. Still, with the great resemblance between them here shown, I hes- 
itate to consider them as distinct. 
Formation and locality: In the brown sands of the Lower Marls from 
near Burlington, New Jersey. 
ANCHURA ABRUPTA Var. ACUTISPIRA, D. var. 
Plate xiv, Fig. 4. 
A single imperfect specimen of an internal cast occurs in the collection 
Acad. Nat. Sci., Phila., from New Jersey, but without more definite locality. 
The spire is only moderately slender, the apical angle being about 35°, 
with rather compact volutions, closely coiled, as seen in the cast, indicating 
a rather thin shell, flattened in the direction of the spire, and have been six 
or seven in number; the last one short, subangular in the middle, and 
rather abruptly contracted in the lower part, and extended in a slender 
point in front; the aperture trapezoidal and oblique; surface bearing dis- 
tinct evidence of slender spiral lines, five of which are above the periphery 
and an undetermined number below, but apparently of about the same size 
and proportion as those above the center. There are also distinct, promi- 
nent, vertical folds crossing the volutions, which are directed slightly for- 
ward in their passage from above in crossing the volution. Twelve of these 
folds mark the last volution as preserved on the cast, but above this they 
are not readily determined, although they appear to be fully as numerous. 
The last volution becomes more distinctly angular on the periphery as it 
approaches the lip, although this latter feature is not preserved. 
The cast differs in the angularity of the volutions and the shorter spire 
from A. abrupta Conrad, as herein identified, but more particularly in the 
fewer and stronger vertical folds and in the single carination marking the 
last volution. This latter feature alone would not be reliable as a specific 
feature, as the prominence of the angulations of this part of these shells is 
usually very variable and they are often not very much developed until 
quite near the lip. The other differences noted are, however, very marked, 
and will readily distinguish it from those identified with A. abrupta. 
