NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
687 
Family ONCOUSOECIIDAE Canu, 1918. 
The axis of the ovicell is parallel to that of the tubes. The ovicell is developed 
at the same time as the adjacent tubes, which are not disarranged in their respective 
position. 
We have been able to recognize two genera, Oncousoecia Canu, 1918, in which 
the ovicell is a dilation of the entire exterior part of the tube, and Peristomoecia 
when the peristomie alone forms the ovicell. 
Fig. 226. — Genus Oncousoecia Canu, 1918. 
A, B. Ovicellecl zoarium natural size and enlarged of Oncousoecia (Tubulipora) lobulata 
Hincks, 18S0. Recent. 
C. Ovicelled zoarium of Oncousoecia ( Crisia ) schmitzi Pergens, 1890. Cenomanian. 
D. Ovicelled zoarium, X 12, of Oncousoecia ( Filisparsa ) bifur cat a Ulrich and Bassler, 1907. 
Cretaceous (Yincentown) of New Jersey. 
Genus ONCOUSOECIA Canu, 1918. 
1918. Oncousoecia Canu, Les ovicelles des bryozoaires cyclostomes, Bulletin Society Geo- 
logique de France, ser. 4, vol. 16, p. 325. 
The ovicell is a dilation of the entire exterior visible part of the tube. The 
oeciostome is not turned toward the base. Fourteen tentacles. 
Genotype. — Tubulipora, lobulata Hincks, 1880. 
Range. — Maastrichtian-Recent. 
The exact limit between this genus and Mecynoecia is rather difficult to de- 
termine when one can not verify the abortion or the derangement of the adjacent 
tubes by dissection. 
The ovicells are generally pyriform, but they are differently arranged; some 
have the point above and others have it below. This distinction does not appear 
