Plate 33. 
Figs. 1, 2. Mystriopora? areolata, new species, (p. 19.) 
1. The incrusting zoarium, X 20, showing the pyriform zooecia, the zooeciules, and the inter- 
zooecial areolae. 
2. Another example, X 20, preserving longer zooeciules. 
Pleistocene: Long Wharf Canyon, Santa Monica, California. 
Figs. 3-5. Membranipora tuberculata Bose, 1802. (p. 22.) 
3. A fossil example of this widespread recent species, X 20, with very large tubercles. 
4. Another example, X 20, with the tubercles less developed and the zooecia still retaining their 
chitinous parts. 
Pleistocene: Santa Monica, California. 
5. Surface of a recent specimen, X 20, showing identity with the fossil form. 
Pacific Ocean: Santa Monica, California. 
Fig. 6. Membraniporina californica Gabb and Horn, 1862. (p. 25.) 
Original figure. 
Pleistocene: Santa Barbara, California. 
Figs. 7-9. Conopeum barbarensis Gabb and Horn, 1862. (p. 28.) 
7. Gabb and Horn’s figure of this species. 
8. A small incrusting zoarium, X 20, showing the simplicity of structure. 
9. The incrusting zoarium, X 20, showing the distinct zooecia with thin mural rim and several 
avicularia. 
Pleistocene: Santa Barbara, California. 
Fig. 10. Hincksina quadrispinosa, new species, (p. 38.) 
The incrusting zoarium, X 20, illustrating the large elongated zooecia with four distal spines. 
Two regenerated zooecia are also shown. 
Pleistocene: Rustic Canyon, Santa Monica, California. 
Fig. 11. Hincksina multispinata, new species, (p. 38.) 
Zooecia, X 20, of the incrusting zoarium, showing their small, elongated oval shape and the 
numerous hollow spines. 
Pleistocene: Santa Barbara, California. 
Fig. 12. Callopora multipora Gabb and Horn, 1862. (p. 44.) 
Gabb and Horn’s figure of this interesting species, which has not been rediscovered. 
Pleistocene: Santa Barbara, California. 
Fig. 13. Callopora crassospina, new species, (p. 41.) 
The incrusting type specimen, X 20. The long fusiform avicularium and the six hollow spines 
are to be noted. 
Pleistocene: Santa Barbara, California. 
Figs. 14-16. Caulorampbus triangularis, new species, (p. 48.) 
14. The incrusting type specimen, X 20. The numerous hollow spines and the small triangular 
avicularium are to be noted. 
15. An example showing the ancestrular zooecia, X 20. 
16. An ovicelled specimen, X 20. 
Pleistocene: Santa Barbara, California. 
Fig. 17. Caulorampbus porosus, new species, (p, 48.) 
The incrusting type specimen, X 20, illustrating the large distinct zooecia separated by numerous 
pores. 
Pleistocene: Santa Barbara, California. 
Figs. 18, 19. Callopora horrida Hincks, 1880. (p. 43.) 
18. Unilamellar, recent zoarium, X 20, with areal spines preserved. 
Pacific coast near Los Angeles, California. 
19. Zooecia of an incrusting fossil example, X 20, illustrating the large avicularia and the areal • 
spines. 
Pleistocene: Santa Barbara, California. 
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