NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
631 
Genotype. — G onescharellina ca/ncellata Busk, 1852. 
Range . — Miocene — Recent. 
The lunoeeia are the openings of special compensation zooeciules. 
All the unilamellar Bipora of Whitelegge, 1887, are classified in this genus 
by Levinsen. 
Genus BIPORA Whitelegge, 1887. 
1887. Bipora Whitelegge, Notes on some Australian Polyzoa, Proceedings Linnean Society 
New South Wales, ser. 2, vol. 11, p. 337. 
The zoarium with lunoeeia. The 
zoaria are plate-like or fan-shaped 
with two layers of zooecia ; ovicells 
are not found. (After Levinsen, 
1909.) The apertura has a proximal 
rimule. 
Genotype. — B ip or a umbonata 
Haswell, 1880. Recent. 
Genus FLABELLIPORA D’Orbigny, 1852. 
1852. Flabellipora B'Orbigny, Paleon- 
tologie Francaise Terrain Cre- 
tace, vol. 5, p. 432. 
The zoaria, which have no lunoe- 
cia, are plate-like, two layered; no ovicells. 
tura has a proximal rimule. 
Genotype. — Flabellipora elegans D’Orbigny, 1852. Recent 
Fig. 193. — Genus Bipora Whitelegge, 1887. 
A-D. Bipora umbonata Haswell, 1880. A. Zoarium, 
natural size. B. Zooecia and lunoeeia magnified. 
(After Haswell, 1880.) C, D. Bipora crassa Tenison- 
Woods, 1880. Operculum and avicularian mandible, 
X 100. (After Kirkpatrick, 1890.) 
(After Levinsen, 1909.) The aper- 
A-F. Flabellipora elegans D’Orbigny, 1852. A-D. Four views of the enlarged zoarium. 
(After D’Orbigny, 1852.) E. Various aspects of a zoarium natural size. F. Zooecia and 
avicularia, X 25. (E. F after Waters, 1887.) 
