Plate 43. 
Figs. 1-9. Idmonea califomica D'Orbigny, 1852. (p. 199.) 
1. Zoarial fragments, natural size. 
2. Celluliferous side, X 12, showing the axial zooecia isolated and closed by a diaphragm. 
3. Posterior side, X 12, illustrating the transverse striations. 
4. Another example, X 12, in which the axial zooecia are open. 
5. A portion of figure 2, X 25. 
6. An ovicelled specimen, X 6. 
7. Transverse thin section, X 12. The tubes are polygonal. 
8. Longitudinal thin section, X 12. 
9. Tangential thin section, X 100. The mural perforations are no larger than in smaller species 
of the genus. 
Pleistocene: Santa Barbara, California. 
Figs. 10-17. Stathmeporaflabellata, new species, (p. 201.) 
10. Zoarial fragments, natural size. 
11. A rather complete flabellate specimen, X 12, with incomplete fascicles. 
12. A fragment, X 12, showing bifurcated fascicles. 
13. A specimen with large ovicell, X 12. 
14. An example with broken ovicell, X 12, illustrating that the peristomes are here adjacent in 
the fascicles. 
15. An ovicelled example, X 12, with a large basal lamella. 
Pleistocene: Santa Barbara, California. 
16. A flabellate example, X 12, with a thick zone of growth. 
17. Longitudinal section, X 25. The tubes are cylindrical with triparietal gemmation. L. B.= 
basal lamella. 
Pleistocene: Rustic Canyon, Santa Monica, California. 
Figs. 18, 19. Diaperoecia Jlabellata, new species, (p. 202.) 
18. The flabellate bilamellar zoarium, X 12, with an ovicell developed. 
19. Portion of the same, X 25. 
Plesitocene: Rustic Canyon, Santa Monica, California. 
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