Plate 44. 
Figs. 1-3. Liehenopora hispida Fleming, 1828. (p. 203.) 
1. Several zoaria, natural size. 
2. An example, X 12, illustrating that the fascicles do not reach the zoarial margin. 
3. An ovicelled example, X 12, with the ovicell not entirely covered by the cancelli and show¬ 
ing no oeciopore. 
Pleistocene: Santa Barbara, California. 
Figs. 4-7. Liehenopora californicx Conrad, 1855. (p. 203.) 
4. Zoaria, natural size. 
5. An ovicelled example, X 12. The oeciostome is located between two fascicles. 
(5. Another ovicelled example, X 12, showing clearly the salient oeciostome and the ovicell 
covered with cancelli. 
7. Inferior side of a discoid, free example, X 12. 
Pleistocene: Santa Barbara, California. 
Figs. 8-9. Liehenopora vtrruearia Fabricius, 1780. (p. 205.) 
Celluliferous surfaces of two ovicelled examples, X 12, referred to this recent species. 
Pleistocene: Rustic Canyon, Santa Monica, California. 
Fig. 10. Liehenopora radiata Savigny-Andouin, 1826. (p. 204.) 
An incomplete although typical zoarium of this wide spread recent species, X 12. The cancelli 
are larger than the zooecial orifices. 
Pleistocene: Rustic Canyon, Santa Monica, California. 
Figs. 11-21. Psilosolen capitiferax, Canu and Bassler, 1922. (p. 207.) 
11. A longitudinal thin section, X 25. 
12. A longitudinal section showing the ovicell at the end of the branch, X 12. 
13. Longitudinal thin section through a bifurcated branch, X 25. The tubes are cylindrical and 
ramify at all heights. 
14,15. Transverse thin sections, X 25. 
16. An example, X 12, illustrating the irregular quincunx arrangement of the peristomes. 
17. An example, X 12, with the peristomes arranged in zones. 
18. A portion of the same zoarial surface, X 25, illustrating that the tubes are visible and the 
peristome thin. 
19. An ordinary transverse section, X 25. 
20. 21. Ovicelled specimens, X 12, illustrating the position of the ovicell at the flattened end of 
the branch. 
Pleistocene: Santa Barbara, California. 
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