NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
421 
Genus HOUZEAUINA Pergens, 1889. 
1889. Houzeauina Pergens, Sur fossilen Bryozoenfauna von Wola Luzanska, Bulletin 
Society Beige de Geologie, vol. 8, p. 68. 
The ovicell is liyperstomial and imbedded in the distal zooecia; it is closed 
by the operculum. The frontal is an olocyst perforated laterally by some areolae. 
The avicularium is derived from a lateral areola, but it develops at the middle 
of the frontal. 
D. Anarthropora E. Aimulosia 
Fig. 124. — Miscellaneous ; 
A. Houzeauina callosa, new species, X 20. 
B. Cyclicopora colum, new species, X 20. 
F. Cyclocolposa 
;enera of tlie Escharellidae. 
Middle Jacksonian of Georgia. 
Vicksburgian of Alabama. 
G. Cycloperiella 
C. Kymella polaris Waters, 1904, X 16. Recent. 
D. Anarthropora verrucosa, new species, X 20. Midwayan of Georgia. 
E. Aimulosia australis Jullien, 188S, X 25. Recent. 
F. Cyclocolposa perforata, new species, X 20. Pliocene of South Carolina. 
G. Cycloperiella rubra, new species, X 20. Miocene of North Carolina. 
Genotype. — Houzeauina ( Eschara ) parallela Reuss, 1869. 
Range. — Jaeksonian-Priabonian. 
This genus is very remarkable and we have no recent equivalent. We think 
that the operculum closes at the same time the ovicell and the zooecia ; the height 
of the real aperture is, in effect, somewhat larger than that of the external aper- 
ture. This common operculum is of different form from the operculum of the 
nonovicelled zooecia. 
The mode of formation and the origin of the median avicularium is as remark- 
able as unexpected. It was in studying the interior of the zooecia that we made this 
