ABT.22. CYCL.OSTOMATOUS BRYOZOA CANU AND BASSLER. 27 



Sti^cture. — The tubes are large; their orifices are very close to 

 each other. The ovicell is transverse, long and narrow. Its outlines 

 are indistinct. The marginal tubes are supported on its convexity. 

 The oeciostome is small, very narrow, subterminal. The basal lamella 

 is very short and the zone of growth is quite visible. 



Occurrence. — Cretaceous (Vincentown marl) : Vincentown, New 

 Jersey. 



Geologic distribution. — Lowest Eocene (Bryozoan bed at base of 

 A quia formation) : Upper Marlboro, Maryland. 



Pk'sioPi/pes.— Cat. No. 52593, U.S.N.M. 



PLAGIOECIA DIVAGANS Cann and Bassler. 1920. 



Plate 10, tig. 6. 



1920. Plagioecia divagans Canu and Bassler, North Araericau Early Ter- 

 tiary Bryojcoa, Bull. 106, U. S. National Museum, p. 712, pi. 121, 

 figs. 1-7. 

 On plate 10, we figure the ovicell of this interesting species, which 

 structure, although loiown, has hitherto not been illustrated. 



Occurrence.— 3 ?LQksom2in and Vicksburgian, various localities in 

 Mississippi and other southern States. 

 Plesiotype.—Q^t. No. 68917, U.S.N.M. 



PLAGIOECIA AMERICANA Ulrich and Bassler, 1907. 



Plate 3, figs. 13-15. 



1907. Berenicea amerlcana Ulrich and Bassler, Bryozoa, Geological Sur- 

 vey of N"w Jersey, Paleontology, vol. 4, p. 315, pi. 20, fig. 7. 



Diameter of peristome 0. 10 mm. 



Zooecial width .12 mm. 



Distance between tubes . 50-0. SO mm. 



Separation of orifices .3G- .44 mm. 



Structure.— The tubes are but slightly convex, ahnost flat. The 

 peristome is elliptical or oval often acuminated distally. They are 

 shorter (fig. 15) in the vicinity of the ancestrula (0.50 mm.) and 

 longer on the zoarial margins (fig. 14), where they measure almost 

 0.80 mm. The separation is much more constant (about 0.40 mm.). 



The ovicell is elliptical, transverse, little globular, little expanded ; 

 as shown in our figures it is almost orbicular. The oeciostome is of 

 the same size as the peristome ; it is turned toward the center of the 

 zoarium. 



Occurrence. — Cretaceous (Vincentown marl) : Vincentown. New 

 Jersey. 



Eolotype and plesiotypes.— Cat. No. 52586, U.S.N.M. 



Measurements.- 



