Bulletin - United States National Museum - Smithsonian Institution

28 BULLETIN 90, UNITED STATES NATIONAL MUSEUM.
FLORIDINELLA, new genus.
The ovicell is endozooecial and separated from the zooccia by a
fold. The polypidian convexity is not prominent. The opesiular
indentations are large and rounded. The opesium is constricted by
two symmetrical lateral teeth at the level of the opercular articulation.
Genotype.—Floridinella vickshurgica, new species. Vicksburgian.
FLORIDINELLA VICKSBURGICA, new species.
Plate 3, fig. 3.
Descnption.—The zoarium is unilamellar, hollow, cylindrical, and
incrusts the stems or small roots of alg?e. The zooecia are elongated,
distinct, separated by a deep furrow; the mural rim is incomplete,
rather broad, distinct from the cryptocyst. The cryptocyst is shal-
low, smooth or finely granular, longer than the opesium. The polyp-
idian convexity is but slightly projecting; the opesiular indenta-
tations are large, symmetrically rounded; the opesium is elongated,
constricted superiorly by two lateral teeth placed at the level of the
operculum.
, „ . fAo=0.20 mm.
Measurements.—Opesium {^ „ . „
^
|fo =0.16 mm.
fZs^O.SO mm.
Zooecmm {-, non n m
[fe =0.30-0.40 mm.
Occurrence.—Vicksburgian : One mile north of Monroeville, Alabama
and numerous localities in the State (very abundant).
Type.—Cut. No. 62583, U.S.N.M.
DACRYONELLA, new genus.
(Daeryon, tear, referring to the form of the avicularia.)
The polypidian convexity protrudes very little and is inconstant.
The opesiules are large, round, lateral indentations. The ovicell is
endozooecial. There are no opesial processes (therefore an opercular
A'alve). The opesium is elongated (therefore the parietal muscles
are much developed). The avicularia are very small, constant,
placed in all the interzocecial angles, and have the form of small
tear drops.
Genotype.—Dacryonella octonaria^ new species. Jacksonian.
This is a Rosseliana ornamented with avicularia. As in this
genus also, the opesiules are inconstant and placed very far from
the aperture in consequence of the great development of the parietal
muscles.
DACRYONELLA OCTONARIA, new species.
Plate 3, fig. 4.
Description.—The zoarium incrusts small shells or more often
creeps over algae; very frequently it consists of m.any superposed