596 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 64 



Fig. 1. Myriozoella plana (Dawson), elongate zooecium at margin 

 of colony. 



Fig. 2. The same, from more crowded area of secondary layer. 



Fig. 3. Myriozoum subgracile d'Orbigny, zooecium showing form of 

 aperture and position of small paired avicularia. 



Fig. 4. The same, form of operculum and median small avicularium. 



Fig. 5. Myriozoum coarctatum (M. Sars), zooecium and large me- 

 dian avicularium. 



Fig. 6. The same, form of operculum and large median avicularium. 



Fig. 7. Myriozoum tenue O'Donoghue, zooecium with ovicell and 

 position of small paired avicularia. 



Fig. 8. The same, portion of branch showing the irregular swollen 

 reproductive area. 



Fig. 9. The same, form of operculum. 



Fig. 10. Mamillopora cupula Smitt, zooecia with ovicell and avicu- 

 laria. 



Fig. 11. The same, dorsal view showing zooeciules with avicularia 

 of different sizes. 



