taguna Ratine ILaboratorp 



195 



NOTES ON THE MARINE ALG^ OF 

 LACUNA BEACH 



JOHN GUERNSEY 



It was my intention during the first summer at Laguna Beach to 

 make some beginning in anatomical and ecological studies of a few 

 of the very numerous and interesting marine Algae occurring there. 

 In the course of this work, large collections accumulated. A set of 

 specimens was submitted to Dr. W. A. Setchell and he has very 

 kindly given the determinations of them, calling especial attention 

 to the fact that many of the names applied to our west coast Alga? 

 are as yet uncertain in their application, and that the nomenclature 

 is in need of careful revision, as some of the species themselves are 

 in need, quite as urgently, of more detailed anatomical studies. I 



B 



Figure 105. Calothrix parasitica (Chauv.) Thurct 



have no desire to present this as a "mere list," since it means much 

 more to me. It includes, however, a list of the commoner forms that 

 any student will encounter at Laguna, and mostly in great abundance. 

 We want to begin to know these things in their distribution and eco- 

 logical relations, and this seems the logical and necessary first step. 



CYANOPHYCEAE 



Brachytrichia quoyi (Ag.) Bornet and Flahault 



One small colony of this species was taken on the holdfast of a 

 Nereocystis coming from about four fathoms. Dr. Setchell says this 



