838 
BULLETIN 106, UNITED STATES ' NATIONAL MUSEUM. 
I he tubes are invisible and hidden by the zoarial calcification; the peristome is 
orbicular or rectangular; the frontal supports two vacuoles at least. The sulci 
are scarcely visible on the dorsal and the vacuoles appear very small and arranged 
in quincunx. The ovicell is very large and quite porous,, spread over the median 
crest and in six interfascicular spaces. 
Fig. 278. — Genus Parascosoecia Canu, 1919. 
A-E. Parascosoecia ( Petalopora ) costata D’Orbigny, 1851. A. Surface of zoarium, enlarged. 
B, C. Longitudinal and transverse section, magnified. (A-C. After Novak, 1877.) D. Longitudi- 
nal thin section. (After Pocta.) E. View of zoarium, X 12, showing the ovicell pierced by the 
tubes. 
F-H. Parascosoecia ( Sparsicavea .) carantina D’Orbigny, 1853. F, G. Specimens with ovi- 
c-ells, X 10, from Cretaceous of England. H. Longitudinal section, X 14. (F-H. After Gregory, 
1899.) 
I-L. Parascosoecia ( Heteropora ) consimilis Ulrich, 1882. I. Ovicelled specimen, X 12, 
from the Midwayan at Mabelvale, Arkansas. .1, K, M. Transverse, tangential, and longitudinal 
thin sections, X 25. L. Vertical section, X 25, showing tubules of consolidation. 
