NORTH AMERICAN MARLY TMRTIARY BRYOZOA. 
795 
Fig. 256. — Anatomy of the family Homeridae Gregory, 1899. 
A-L. Uomera lichenoides Pontoppidam, 1752. A. Section of embryo, X 85. Whether the 
cilia on the upper part are in two tufts or are continuous is not clear. B. Transverse section of 
ovieell, X 25. C. Longitudinal section, X 25, showing the polypide and the ovicell, surrounded 
by the wall ( w ) , from which the reticulum (r) has separated, no doubt in consequence of the 
processes of preservation and preparation. In the reticulum, on the left-hand side, some ovarian 
masses are seen. Six embryos are seen in the section. D. Section of protoplasmic reticulum con- 
taining ovarian masses, X 450. This reticulum is shown slightly magnified in fig. C. E. Section 
of the wall of the ovicell, X 100. F. Section of the wall of the ovicell, X 250. G. Zoarium, 
natural size. H-J. Ovicells, X 15, with lateral oeciostome (oe). K. Dorsal of a zoarium, X 15. 
The ovicell is broken and shows the interior of the oeciopore ( oep ). L. Frontal, X 15. (After 
Waters, 1903, and Smitt, 1867.) 
M. Hornera concatenate Reuss, 1869. Longitudinal section, X 12, showing terminal closure. 
(After Waters, 1884.) 
N, O. Hornera fissurata Busk, 1884. N. Dorsal surface (growing end), X 25. O. Section 
of zooecial tubes, X 85, showing interior projections. (After Waters, 1888.) 
P. Hornera antarctica Waters, 1904. Longitudinal section, X 25. (F, frontal and D, dor- 
sal.) The scaly and lamellar structure is quite visible. The vacuoles ( v ) perforate the zoarium. 
The tubes ( t ) grow and bud as in the other Cyclostomata; they do hot issue from a central 
canal as Hennig has incorrectly represented. 
Q. Transversal section, X 25. All the polygonal tubes are approximately equal. 
R. S. Frontal and dorsal, X 20, indicating the terminology peculiar to this family. (After 
Hennig, 1910.) 
T. Hornera jacksonica, new species. Interior, X 12, showing that there Is no sagittal canal. 
