174 M « ^oslie. 



Explanation of the Plates. 



Plate 1. 



Halosaecion pubescens. 



Habit-figure, % 



Plate 2. 

 Halosaecion pubescens. 



Fig. 1. Part of a transverse section of the lower part of 

 the frond. 32 %. 



Bangia virescens. 

 Fig. 2—6. Vegetative threads. 23 %. 

 « 7 — 9. Sporocarps and antheridia (?). 230 / x . 



Enteromorpha microphjlla. 

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



the callus, seen from the surface. 23 %. 

 « 11. Transverse section of the same part. 23 %. 

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



the surface. 23 %. 

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



frond, seen from the surface. 230 / 1 . 

 « 14. Transverse section of the same part. 230 /i. 

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



two different specimens. 230 /i- 



Pilinia minor. 

 Fig. 17— -22. Young and elder specimens of the plant. 600 / v 



