56 BULLETIX 125, UNITED STATES >^ATI01s'AL ML'SEUM. 



Family OPESIULIDAE Jullien, 1888. 



Genus FLORIDINA Jullien, 1881. 



(For description, see Bulletin 106, U. S. National Museum, p. 219.) 

 FLORIDINA PYRIPORA Canu a»d Sassier, 1919. 



Plate 1, fig. 1. 



1919. Floridina pyripora C.\NU and B.^.ssler, 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 polymoq^hism is the rule in this genus; but we believe more specimens 

 will prove this to be a good species. The poly^iidian 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) , ~ "" 



/is = 0.48 -0.50 mm. 

 Zooeciaj ^^ = 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. — OUgocene (Antigua formation) : Rifle Butts, Antigua, Leeward 

 Islands (rare). Oligocene (AnguUla formation): Southwest side of Crocus Bay, 

 Anguilla, Leeward Islands (rare). 



Holotype.—C&t. No. 68472, 68473, U.S.N.M. 



FLORIDINA FUSIFERA Canu and Sassier, 1919. 



Plate 1, fig. 0. 



1919. Fhridinafusifera C.^nu 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 

 cryptocyst is larger than the opesium; it is of little depth and is finely granulated: 

 the opesium is trifohate; the lateral apophyses are very sahent; 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. 



il/eas^r.m.n«s.-Opesia[f; = 0.20 mm^ Zooecia(^^ = 0.50 mm. 



Uo = 0.18 -0.20 mm. lfe = 0.40mm. 



Onychocellaria(?P^^^^°^ = <^;fO ^l ^-^O nmi. 

 IZooecmm = 0.60 by 0.36 mm. 



There are only four zooecia intact on the single zoarium obtamed. 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. 



Occwrrence.— Oligocene (Antigua formation): Rifle Butts, Antigua, Leeward 

 Islands (very rare). 



Holotype.—C&t. Xo. 68474, U.S.N.M. 



