Bulletin - United States National Museum - Smithsonian Institution

66 BULLETIN 96, UNITED STATES NATIONAL MUSEUM.
ADEONELLA FOLLICULATA, new species.
Plate 6. fig. 3.
Description.—The zoarinm is bilamellar with two lamellae back
to back and separable; the fronds are lobed, very thin and fragile.
The zooecia are very long, distinct, separated by a furrow, little convex,
bordered with numerous parietal areolae (10-12 pairs). The
peristomie is short, somewhat projecting exteriorly and is perforated
by a spiramen; the peristomice is semilunar with a convex lower
lip; the aperture (interior) presents a proximal concave border.
The gonoecia are larger (0,30mm.) than the other zooecia; their external
aperture is greater (la=0.10mm.) and the spiramen is more
removed from the aperture. There is a very small, simple avicularium
on the peristomie.
^ , , . fZs=: 0.65-0.75 mm.
Measurements.—Lateral zooecia ,_^ ^^_^ ^„ ^^^^
, .
. (Z3=0.50mm.
,
Axial zooecia{, „ ^^
[7.2=0.20 mm.
. ^
Gonoecia, „ „^
[?0=O.3Omm.
_ . . ^ „ . fA/^=0.04mm.
Peristomice ot zooecia / „ ^-
fZs=0.50mm.
^ . . ^ . [A;?=0.04mm.
Peristomice ot ©oi^ceciaj^^^Q
.j^^^^^^
Occw^ence.—WiMlQ Jacksonian (Castle Hayne beds) : Wilmington,
North Carolina (common).
Type.—C2it. No. 62G08, U.S.N.M.
Genus ADEONELLOPSIS MacGillivray, 1886.
1886. Adeoncllopis MacGilli\ray, Description of New Polyzoa. pt. 9,
Transactions Royal Society Victoria, p. 7.
The zooecia provided in the central line with one or several
ascopores. (Levinsen.)
The ascopores are grouped at the base of a cribriform area. Inter-
zooecial avicularia and gonoecia are present.
Genotype.—Adeonellopsis foliacea MacGillivray, 1886.
Range.—Wilcoxian-Eecent.
Seven new species ranging from the Wilcoxian to the Vicksburgian
have been determined in the Eocene of the United States.
PHYLACTELLIDAE, new family.
The ovicell is recumbent ; its orifice is very large and closed by a
special operculum. " The larvae are large and are more fully developed
within the ovicell than is usual ; the corona and cilia are very
distinct."