NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 
189 
K-U. Balopora multiradiata Reuss, 1869. K. Superior face of a colony showing the central pit. 
L, N. Groups of ovicelled zooecia. M. Inferior face of the colony K. 0. Specimen showing a second 
layer. P. Group of ovicells, X 25. Priabonian at Montecchio-Maggiore, Italy. Q. Specimen from Val 
di Lonti, Italy (Priabonian), showing a second layer from the neighborhood of the pit, X 10. R. Base 
showing two circles of zooecia, X 10. S. Summit of a colony showing the pit with small zooecia 
around it as well as ordinary zooecia. T. Section showing the pit and the zooecia in a second layer 
around the first. From near Novezzina, Italy (Priabonian), X 25; a, zoarium showing a cap formed 
by a second layer of zooecia, from Montecchio-Maggiore, Italy (Priabonian). U. Meridian section 
showing the apical pit, the second layer and the ovicells. (After Waters, 1891.) ap, aperture; 
ov, ovicell. 
a. 
Fig. 37.—Genus Orbitulipora Stoliczka, 1861. 
A, B, H-J. Orbitulipora petiolus Lonsdale, 1850. A. An entire zoarium from Latdorf. B. Trans¬ 
verse section showing the two lamellae placed back to back (A, B, after Stoliczka, 1851.) H. An entire 
bilamellar zoarium. I. Group of ovicelled zooecia. J. Lateral view of the same zoarium as H, show¬ 
ing the two lamellae. (H-J, after Reuss, 1867.) 
C-E. Orbitulipora excentrica Seguenza, 1878. C. An entire zoarium showing a lateral pit, X 12. 
D. Meridian section -showing the ancestrula surrounded by 5 zooecia, X 12. E. Transverse section 
following the line a-a at right angles to D, X 25. 
F, G. Orbitulipora lenticularis Reuss, 1869. Oral apertures, X 85. (C-G, after Waters, 1919.) 
i 
Genus STICHOPORINA Stoliczka, 1861. 
1861. Stichoporiria Stoliczka, Oligocane Bryozoen von Latdorf in Bernberg, Sitzungsberichte 
der k. Akademie der Wissenschaften, Wien, vol. 65, Abth. 1, p. 92. 
“With a pit towards which the zooecia are directed. Oral aperture small. 
Unilaminate to bilaminate ? Pit central.” (Waters.) 
Genotype.—Stichoporina reussi Stoliczka, 1861. 
