308 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



PLATE 29 



Fig. 21. Sertularia stabilis, new species 



a. Natural size. 



b. Basal portion of stem. 



c. Portion of stem with origin of branches. 



Fig. 22. Thuiaria insociabills, new species 



a. Natural size. 



b. Portion of stem showing origin of branches. 



Fig. 23. Aglaophenta dtspar, new species 



a. Natural size. 



b. Portion of hydrocladium with hydrothecae. 



c. Two hydrothecae (x40). 



