NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
681 
arium). The zooecia on the upper surface are radially arranged around a central 
area of crowded apertures.” (Gregory, 1909.) 
Genotype. — Defranciopora ( Defrancia ) cocliloidea Hagenow, 1851. Maas- 
trichtian. 
Fir. 222. — Forma Heteropora de Fdainville, 1S30. 
A-G. Heteropora cryptopora Goldfuss, 1827. A. Zoarium, natural size. B, C. Portion of 
the surface, X 15 and X 5. (Figs. A-C after Hagenow, 1851.) D. A zoarium, X 2. E. Portion 
of the surface of the same zoarium, X 13. (Figs. D, E after Gregory, 1909.) 
F, G. Zoarium of Heteropora cryptopora var. ten era Hagenow, 1851, and surface, X 15. 
(After Hagenow, 1851.) 
H, I. Heteropora conifera Lamouroux, 1821. H. Transverse section through central zooecia, 
X 12. I. Longitudinal section through marginal zooecia, X 12, showing diaphragms and meso- 
pores. (After Gregory, 1896.) 
.J, K, L. Heteropora pelliculata Waters, 1879. Longitudinal, tangential, and transverse thin 
section. 
Genus HETEROPORA Blainville, 1830. 
1830. Heteropora de Blainville, Dictionnaire des Sciences naturalles, vol. 60, p. 381. 
The tubes are cylindrical and long. Mesopores are present. The zoarium is 
massive or branched. 
Genotype. — Heteropora (C eriopora) cryptopora , Goldfuss, 1827. 
Range. — Neocomi an -Recent. 
