Herposiphonia of Tropical Pacific — Hollenberg 
541 
Fig. 1 . A, Herposiphonia delicatula , apex of a determinate branch. B, Herposiphonia delicatula, upper part 
of determinate branch bearing spermatangial stichidia four segments from the base. C, Herposiphonia den - 
droidea, apex of young determinate branch. D and E, Herposiphonia dendroidea, variant form, with tips of 
determinate branches, showing single trichoblast and terminal scar-cell respectively. F, Herposiphonia variabilis , 
apex of determinate branch with spermatangial stichidium. G. Herposiphonia trichia , showing tetrasporangia 
and unbranched trichoblasts. 
