Plate 30. 

 Fig. 1. LcpniUa rrihrosa^ Maplestone, 1900. (p. 134.") 



Surface of the specimen, X 20, referi-ed to this Australian Miocene species. 



Pleistocene: Rustic Canyon, Santa Jlonica, ('alifornia. 

 Fig.?. 2, 3. Foie.slrulina inalusi Savig-ny-.\udouin, 1S2(). ip. 115.) 



2. Photograph, X 20, showing small zooecia. 



3. Zoarium, X 20, with large zooecia, some showing the ovicell. 

 Pleistocene: Santa Barbara, California. 



Figs. 4, 5. MkroporeUa ciliala Linnaeus, 1759. (See also pi. 20. figs. 1-G.) (p. 119.) 



4. Zoarium, X 20, e.xhibiting zooecia with small avicularia. 



5. Zoarium, X 20, in which the zooecia have large avicularia. 

 Pleistocene: Santa Barbara, California. 



Figs. 6, 7. MicrnporeUa ambonata Ilincks, 1NS2. (p. 123.) 



6. Marginal zooecia without ovicell, X 20. 



7. Ovicelled zooecia of the same specimen, X 20, exhibiting also the frontal umbo. 

 Pleistocene: Santa Barbara, California. 



Figs. 8-10. Microporella cJifornki Hincks, 1883. (p. 123.) 



S. Zooecia, X 20, showing only a single but well-developed avicularium. 



9. Zoarium with ovicell zooecia, X 20, with a single avicularium. 

 Pleistocene: Long Wharf Canyon, Santa Monica, California. 



10. Normal and ovicelled zooecia of a large expansion, x 20. 

 Pleistocene: Santa Barbara. California. 



Figs. 11, 12. Microporella ribracidifem Ilincks, 1883. (p. 124.) 



11. A zoarium, X 20, with ancestrular zooecia. 

 Pleistocene: Rustic Canyon, Santa Monica. California. 



12. Ovicelled and normal zooecia, X 20, illustrating the avicularia and the six hollow spines. 

 Pleistocene: Santa Barbara, California. 



Fio. 13. Microporella euslomata Gabb and Horn, 1802. (p. 124.) 



Zoaria! surface, X 20, with ovicelled and normal zooecia and with the avicularium oblique to the 

 zooecial axis. 

 Pleistocene: Rustic Canyon, Santa Monica, California. 

 280 



