NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
601 
Occurrence. — Middle Jacksonian: One and one-half miles southeast of Georgia 
Kaolin Company Mine, Twiggs County, Georgia (very rare). 
Eolotype. — Cat. No. 64212, U.S.N.M. 
Genus OSTHIMOSIA Jullien, 1888. 
1888. Osthimosia Jullien, Mission scientific du Cap Horn, vol. 6, Zoologie, p. 64. 
The ovicell is not perforated. The frontal is surrounded by areolae. The 
apertura bears a proximal rimule. There are no spines. 
Fig. 179. — Genus Osthimosia Jullien, 1888. 
A-F. Osthimosia eatonensis Busk, 1884. A. Zooecia seen in profile. B. Frontal view of 
zooecium. C, D. Two views of the interzooecial avicularium closed by the mandible. E. Zoarium 
natural size. F. Aperture, operculum, and avicularian mandible. (A-F after Busk, 1884.) 
G. Osthimosia otopeta Jullien, 1888. Zooecia, X 35. (After Jullien.) 
H, I. Osthimosia evexa Jullien, 1888. H., Zooecia, X 35. (After Jullien, 188S.) I. Oper- 
culum and avicularian mandible, X 85. (After Waters, 1904.) 
J. Osthimosia clavata Waters, 1884.' Operculum and avicularian mandibles, X 85. (After 
Waters, 1904.) 
Selected, genotype. — Osthimosia ( Cellepora ) catononsis Busk, 1884. Jack- 
sonian — Recent. The genotype of Jullien was Osthimosia evexa Jullien, 1888. 
The recent species of this genus are : 
Osthimosia (C ellepora) eatonensis Busk, 1884. 
Osthimosia otopeta Jullien, 1888. 
Osthimosia clavata Waters. 1884. 
Osthimosia (C ellepora) signata Busk, 1884. 
Osthimosia evexa Jullien, 1888. 
