174 



M. Foslic. 



Explanation of the Plates. 



i 



Plate 1. 



Halosaccion puhescens^ 



Habit-figiire. Va* 



Plate 2. 



Halosaccion pubesccns. 



Fig. L Part of a trausverse section of the lower part of 



the frond. ^^Vi- 



» 



Bangia vireseens. 



Fig. 2 — 6. Vegetative threads. 



230 



A- 



7 — 9. Sporocarps and antheridia (?). 



Enteromorpha microphylla. 



230 



/i. 



Fig. 10. Part of the base of the frond, about 3 mm. from 



the callus, seen from the surface. ^^7i« 



11. Transverse section of the same part. ''^^^i. 



12. Part of the frond towards the middle, seen from 



the surface. ^^7i- 



r 



13. Part of the upper and zoospore-bearing part of the 



frond, seen from the snrface. ^^7x' 



14. Transverse section of the same part. ^' 



230/ 



(v 

 « 15—16. Part of a transverse section of the middle of 



two different specimens, ^*^7i- 



Pilinia minor. 



Fig". )17— 22. Young and elder apeeimens of the plant. '^''7i« 



