56 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
Family OPESIULIDAE Jullien, 1888. 
Genus FLORIDINA Jullien, 1881. 
(For description, see Bulletin 106, TJ. S. National Museum, p. 219.) 
FLORIDINA PYRIPORA Canu and Bassler, 1919. 
Plate 1, fig. 1. 
1919. Floridina pyripora Canu and Bassler, Geology and Paleontology of the West Indies, Bryozoa, 
Publications Carnegie Institution of Washington, No. 291, p. 82, pi. 2, fig. 2. 
The few specimens of this incrusting species which have been collected in the 
Leeward Islands seem hardly sufficient for the description of a new Floridina, 
because polymorphism is the rule in this genus; but we believe more specimens 
will prove this to be a good species. The polypidian convexity is little salient; 
the opesiules are large and poorly defined; the lateral apophyses are very little 
salient; the general aspect of the opesium is pyriform. The ovicell is endozooecial, 
smooth, and salient. 
Measurements .— 
Opesia (including opesiules) 
ho = 0.20 mm. 
lo = 0.22 mm. 
. lLz = 0.48 — 0.50 mm. 
Zooecia j i 2 = 0 40-0.44 mm. 
Floridina antiqua Smitt, 1872, a recent species in the Gulf of Mexico, is 
marked by large lateral denticles and by small opesiules, giving it a quite different 
aspect. 
Occurrence. —Oligocene (Antigua formation): Rifle Butts, Antigua, Leeward 
Islands (rare). Oligocene (Anguilla formation): Southwest side of Crocus Bay, 
Anguilla, Leeward Islands (rare). 
Holotype.— Cat. No. 68472, 68473, U.S.N.M. 
FLORIDINA FUSIFERA Canu and Bassler, 1919. 
Plate 1, fig. 5. 
1919. Floridina fmifera Canu and Bassler, Geology and Paleontology of the West Indies, Bryozoa. 
Publications Carnegie Institution of Washington, No. 291, p. 83, pi. 1, fig. 3. 
Description. —The zoarium is incrusting. The zooecia are hexagonal; the 
cryptocvst is larger than the opesium; it is of little depth and is finely granulated; 
the opesium is trifoliate; the lateral apophyses are very salient; the opesiules 
are large and rounded; the polypidian convexity is very salient and convex. 
The onychocellarium is large, somewhat constricted laterally, and is provided with 
a very large orifice. Here and there are small fusiform avicularia. 
Measurements .— 
ho = 0.20 mm. 
Zo = 0.18 — 0.20 mm. 
Zooecia* 
\Lz= 0.50 mm. 
lz = 0A0 mm. 
= 0.30 by 0.20 mm. 
1 = 0.60 by 0.36 mm. 
There are only four zooecia intact on the single zoarium obtained. The 
presence of small fusiform avicularia has appeared to us sufficient to justify the 
creation of this species, this feature never having been observed in the genus. 
Occurrence. —Oligocene (Antigua formation): Rifle Butts, Antigua, Leeward 
Islands (very rare). 
Holotype. —Cat. No. 68474, U.S.N.M. 
Onychocellaria 
Opesium 
Zooeciun 
