V* * 
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12, 13. Herposiphonia crassa. Terminal portion of an indeterminate branch. 
14. Herposiphonia tenella . Terminal portion of an indeterminate branch. 
15. Herposiphonia dubia. Terminal portion of an indeterminate branch and portions of determinate branches. 
16. Herposiphonia parca , showing immature terminal cystocarps. 
17. Herposiphonia variabilis. Terminal portion of an indeterminate branch. 
18. Herposiphonia variabilis, with terminal spermatangial stichidia. 
