224 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
In its most usual aspect ancl when altered by fossilization, the opesium of 
the onycliocellariinn resembles a small bottle , whence our specific name. 
Affinities.— Floriclina laguncula differs from F. antiqua Smitt, 1873, in its 
smaller micrometric measurements ( Lz 0.40 mm.), in its more apparent mural 
rims, in its smaller opesiules rarely visible exteriorly, and in its opesium which 
is reduced to the opercular region. 
It differs from Floriclina asymmetrica in the bottle shaped opesium of the 
onychocellarium, in its more elongated, regular zooecia, and in the symmetry of its 
opesium. 
Occurrence. — Middle Jacksonian (Castle Havne limestone) : Wilmington, 
North Carolina (very common). 
Cotypes. — Cat. No. 63985, U.S.N.M. 
FLORIDINA ASYMMETRICA, new species. 
Plate 35, figs. 6-8. 
Description. — The zoarium is unilamellar, tubular, growing over algae or 
incrusting their radicles. The zooecia are broad, distinct, hexagonal, somewhat 
ogival in shape; the cryptocyst is shallow, a little larger than the opesium, granu- 
lar, without mural rim; the opesium is trifoliate and divided by two salient proc- 
esses serving as upper limits to two incomplete and unsymmetrical opesiules; the 
polypidian convexity is deep, not prominent, and unsymmetrical. The onychocel- 
larium is larger than the zooecium, pentagonal, very elongated; its opesium is 
triangular, denticulated. 
Measurements. — Opesium (Ao= 0.20mm. „ . \Lz= 0.36-0.40 mm. 
(including opesiules) U<9=0.16-0.20 mm. 
„ ... fZem.= 0.50 mm. 
OnvchocellariumC 
J [con— 0.25 mm. 
I fe=0.36-0.40 mm. 
Variations.- — We have stated that irregularity is the rule in this genus. The 
symmetry of the zooecia is not absolute; on nearly all the zoaria there are asym- 
metrical zooecia. In this species the phenomenon is more general and symmetrical 
zooecia are rarer. The opesiular indentations and the polypidian convexity also 
lack symmetry, following the obliquity of the polypide in its lodging place occa- 
sioned by the eccentric attachment of the retractor muscles. 
Affinities.- — This species differs from Floridina laguncula in the absence of 
mural rim and in its irregular, although more visible, opesiules. 
It differs from Floridina antiqua Smitt in its smaller micrometric measure- 
ments (Zs=0.40 mm), its less developed opesiules, and in its irregular and less 
visible polypidian convexity. 
Occurrence. — Upper Jacksonian (Ocala limestone) : Bainbridge, Georgia 
(rare) ; Old Factory. 14 miles above Bainbridge, Georgia (rare). 
Cotypes . — Cat. No. 63982, U.S.N.M. 
