GASTEROPODA OF THE EOCENE MARLS, 225 
DOLITD AS. 
Genus FICUS Rosseau. 
FICUS PENITUS ? 
Plate xxxIv, Fig. 5. 
Pyrula penitus Conrad: Foss. Shells Tert., 1st ed., p. 32. 
Pyrula tricarinata Con.: Foss. Shells Tert., 2ded., p. 38, Pl. xv, Fig. 6. 
Pyrula cancellata and P. elegantissima Lea: Cont. to Geol., pp. 154, 155, Pl. v, 
Figs. 160, 161. 
Sycotypus penitus Conrad: Am. Jour. Conch., vol. 1, p. 26. 
Priscoficus Smithii ? (Sowerby) Conrad: Meek, Check List Eocene Foss., p. 16. 
Pyrificus Smith (Sow.) Meek : Geol. N. J., Newark, 1868, p. 732. 
A single cast of a specimen, probably of this species, has been ob- 
tained from the upper beds at Shark River. . It presents the general fea- 
tures of the species in all respects as to form and proportions, differing only 
in the surface characters which here consist of revolving lines placed at 
somewhat regular distances and are sharply elevated with concave spaces 
between, being evidently only the stronger lines of the shell, while the 
finer intermediate ones have not been visibly retained on the cast. But, on 
examination with a strong glass, remains of the finer ones are seen. The 
transverse lines, those parallel to the border of the aperture, are strong, irreg- 
ular lines, although placed at nearly equal distances from each other. The 
spire of the specimen is somewhat unusually elevated for the species, and 
the top of the body volution flattened, with an angle separating it from the 
general surface of the volution. This, however, is principally the effect of 
compression, and in the shells as they occur at Claiborne, Alabama, there 
is frequently a marked angle at this point. The species, as it occurs at 
Claiborne, is extremely variable itt surface markings; some examples being 
finely and evenly cancellated over the entire surface by the transverse and 
longitudinal lines, while others will have a few of the spiral or longitudinal 
lines elevated into sharp carinz forming deeply concave spaces between 
marked by finer lines. Others are found which present all the gradations 
MON XVIlI——15 
