NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
833 
Fig. 276. — Genus Ascosoecia Canu, 1919. 
Forma Zonopora D’Orbigny, 1854 ( =Zonatula Gregory, 1909). 
A-I. Ascosoecia ( Zonopora ) arborea Koch and Dunker, 1837. A. Zoarium restored, natural 
size, from the Neoeomian of France. B. Surface of a well preserved zoarium with salient peri- 
stomes. C. Surface of a worn zoarium with nonsalient peristomes. (A-C, after D’Orbigny, 1854.) 
D. Longitudinal section. (After Pergens, 1889.) The walls are vesicular. E. Surface of a 
zoarium of the variety subnodosa, X 10. F. Transverse section of the same variety, X 10. G. 
Transverse section, X 10, showing, like the preceding, that the walls of the tubes are vesicular 
(=moniliform of Gregory). H. A transverse section, X 10, showing the apertures and single 
circle of mesopores. I. Part of a vertical section, X 10, from the same specimen showing the 
moniliform walls of the zooecia. (D-I. After Gregory, 1909.) 
Ascosoecia ( Zonatula ) pseudotorquata Hagenow, 1851. J. Zoarium, natural size, from the 
Cretaceous at Maastricht. K. Portion of the surface, X 20. (After Pergens, 1893.) 
L. Part of a vertical section, X 18, near the edge of a zoarium of var. irregularis showing 
zooecia cut longitudinally and transversally, and moniliform distal walls of the outer zooecia. 
M. Part of the vertical section, X 18, of a long branch, 5 mm. in diameter, of var. irregu- 
laris. (L, M, after Gregory, 1909.) 
Ascosoecia ( Zonopora ) ligeriensis D’Orbigny, 1853. N. Ovicell found on a specimen from the 
Maastrichtian at Royan, France, X 12. O. Interior of ovicell on a specimen from the same 
locality, X 20. 
' 55899— 20— Bull. 106 53 
