122 BULLETIN" 103, UNITED STATES NATIONAL MUSEUM. 



Holoporella albirostris (Smitt). 



Fig. 8. Several zooecia inueh enlarged (after Smitt). 

 Recent, Gulf of Mexico. 



Stichoporina tuberosa, new species. 



Fig. 9. Two zoaria, natural size. 



10, 11. Two views X 20, of the convex, celluliferous side. 

 12. Photograph of the concave side, X 20. 

 Miocene, Banana River, Costa Rica. 



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