324 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



PLATE 4 



Figs. 1-2. Spermolhamnion pliycopliilum. Fig. 1, \vide forks of a fe- 

 male plant showing a mature carposporangial cluster. 

 Fig. 2, a narrowly forked vegetative filament, x 70. I. 

 Santa Maria. 



Figs. 3-10. Lejolisia colomhiana. Figs. 3-7, portions of tetraspo- 

 rangial filaments showing the long stalked sporangia 

 and, in figs. 3 and 5, the long sterile filament tips. Fig. 

 6 shows the development of branchlets opposite spo- 

 rangia, which occasionally occurs. Figs. 9, 10, tips of 

 male filaments with terminal spermatangial clusters. 

 Fig. 8, tip of a female filament, showing the pericarp- 

 like investment which surrounds the cystocarp. x 15 5. 

 Colombia. 



Figs. 11-12. Cerainiiim Iioodii. Fig. 11, tip of a filament showing the 

 forcipate apex and the narrowly separated zones of 

 nodal cortication composed of irregularly placed cells. 

 Fig. 12, a portion of a young filament showing two seg- 

 ments and parts of two others, the nodal cortication 

 irregular, the decurrent internodal cortication now well 

 begun and consisting of clear longitudinal filaments, x 

 155. I. Espanola. 



