568 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 50 



Fig. 1. Rliamphostomella fortissima Bidenkap, zooecium, ovicell and 



avicularia; reduced one-half. 

 Fig. 2. The same, giant avicularium, not reduced. 

 Fig. 3. Rliamphostomella hincksi Nordgaard, zooecium with ovicell. 

 Fig. 4. Rhamp/iostomella curviro strata O'Donoghue, showing the 



lyrula, ovicell and avicularium. 

 Fig. 5. Rliamphostomella gigantea new species, showing aperture, 



ovicell, avicularium and costate front with a few pores, 



reduced one-half. 

 Fig. 6. Rhampliostomella ovata (Smitt), zooecium with scattered 



pores, aperture and avicularium. 

 Fig. 7. Rhamphostomella costata Lorenz, zooecium, avicularian 



umbo and aperture. 



