306 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



PLATE 28 



Fig. 18. Sertularella multinoda, new species 



a. Natural size. 



b. Portion of main stem with hydrothecae. 



c. Portion of stem with origin of branch. 



Fig. 19. Sertularella similis, new species 



a. Natural size. 



b. Portion of stem showing arrangement of hydrothecae. 



c. Portion of stem and branch with gonangia. 



Fig. 20. Sertularella sinuosa, new species 



a. Natural size. 



b. Portion of sinuous stem with hydrothecae. 



c. and d. Gonangia. 



