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PACIFIC SCIENCE, Vol XXII, October 1968 
Fig. 19-25. (Scale = 150(a) 
19. Herposiphonia pacifica . Apex of determinate branch. 
20. Herposiphonia parca form dispar , showing the comparative size of determinate and indeterminate 
branches. 
21. Herposiphonia variabilis, showing a variant branching pattern. 
22. Herposiphonia parca, with young terminal cystocarps. 
23. Herposiphonia parca, with young terminal spermatangial stichidia. 
24. Herposiphonia dendroides var. minor . Terminal portion of indeterminate branch. 
25. Herposiphonia obscura . Terminal portion of an indeterminate branch and parts of mature determinate 
branches. 
