1917 



^luenscher; Key to Phaeophyceae 



283 



Mesogloia Andersonii 



PLATE 67 



Fig. 49. p. Portion of plant; X 0.5. a, Cross section of cortical 

 region of branch; h, hyaline hair; s, unilocular sporangia; (After Far- 

 low); X about 400. 



Five species of Phaeophyceae, so far not known to occur in Puget 

 Sound, have been reported by Mac^Iillan (6) from the southern shore of 

 Vancouver Island, British Columbia; namely, Lessonia littoralis Farlow, 

 Eisenia arhorea Aresch., Thallassiophyllum clathrus (Gmel.) P. & R., 

 Chorda filum (L.) Lamour. and Dictyoneuron Calif or nicum Ruprecht. 

 It would therefore not be surprising to find these species sparingly on 

 the rougher shores of Puget Sound, especially along the American shore 

 of the Strait of Juan de Fuca. 



