152 Piiget Sound Marine Sta. Pub. Vol, 1, No. 13 



PLATE 27 



Fig. 13. A strip of Laminaria saccharina 30 cm. long and 3 cm. 

 wide, marked into 5 cm. spaces. 



Fig. 14. Same strip as figure 13, 41 days later, showing distribution 

 of growth. 



