GASTEROPODA OF THE LOWER GREEN MARLS. 93 
marked by numerous vertical folds, with shehtly concave spaces between; 
the folds are narrow and distinet, and very slightly bent backward in the 
middle of their length in their passage across the volution, but not inter- 
rupted perceptibly at the line separating the band from the body of the 
volution, and become obsolete on the rostrated part of the last one. Be- 
sides the vertical folds, the entire shell is marked by sharp, closely arranged 
spiral lines, which are finer and more numerous on the upper part, be- 
coming more distant and stronger below, especially on the lower part of 
the last volution, where they seem to have alternated with finer interme- 
diate striz. This latter feature may be only apparent, however, as the 
condition of the specimens is not such as entirely to establish this feature 
as a character of the shell. The crossing of the vertical folds by the spiral 
striz in the upper volutions produces a very decided and beautifully can- 
cellated structure. | 
It is barely possible that this shell may not properly belong to the 
Mitride, but in the condition of the only fairly preserved specimen it is not 
possible to develop the features of the columella perfectly, as this por- 
tion has been mutilated by a stroke of a tool in digging the marl, but on 
separating the body volution from the matrix, the columella became par- 
tially exposed, but no ridges appear to exist. The general form of the 
shell would also remind one of the internal casts of the genus Volutoderma, 
of which we know but little of the external features; but the absence of 
columellar ridges would also be an objection here, and the features are 
more those of AMttre than of Voluta or Fusus. It is possible that owing to 
the peculiar condition of preservation the substance of the ridges may have 
been destroyed, although once existing. 
Formation and locality: In the lower, coarse green marls of the Creta- 
ceous, at Freehold, New Jersey. Among collections made by the late Rev. 
Dr. Reiley. | 
TURRICULA LEDA, h. Sp. 
Plate x1, Fig. 7. 
Shell fusiform, with a moderately elevated and turreted spire, the apical 
angle of which is somewhat less that 30°; volutions five or six in number, 
