160 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 



PLATE 27 



Fig. 1-2. Ceramium viscainoense Daws. Fig. 1, Habit of part of the type, X 

 7.5; Fig. 2, Terminal part of a tetrasporangial branch, X 30. 



Fig. 3. Centroceras clavulatum (Ag.) Mont. Habit, X 10. 



Fig. 4. Centroceras helium S. & G. Apex and tetrasporangial branch of the 

 type, X 123 (after S. & G.). 



Fig. 5. Ceramium vagabunde Daws. Part of a tetrasporangial axis, X 34. 



Fig. 6-7. Ceramium sinicola S. & G. var. sinicola, X 100 (after Setchell & 

 Gardner). Fig. 6, Apex of an axis; Fig. 7, Portion of a mature tetra- 

 sporangial axis. 



Fig. 8. Ceramium sinicola var. interruptum (S. & G.) Daws. Part of an 

 old tetrasporangial axis, X 40 (after Setchell & Gardner). 



