Vol. 3] T]iQ California Shore Anemone. 45 



crystalline. The same adjective describes the specimens from 

 La Jolla which live in the caves. The characteristic green color 

 of the species is found only in individuals exposed to the sun. It 

 is due to the presence of a unicellular alga in the endoderm of 

 the column wall, mesenteries and tentacles. Where sunlight does 

 not penetrate, as under wharves (Calkins), or in caves, the 

 algae, though present, do not develop so luxuriantly as in more 

 exposed situations, and the polyps are correspondingly pale. 

 Similarly, the proximal region of the columns, particularly in 

 those individuals which are largely buried in the sand, is much 

 paler than the distal region. 



The foregoing facts lead to the conclusion that Brandt's spe- 

 cies extends from Alaska south to Panama, including Pickering's 

 artemisia and the California form. I am still doubtful about the 

 position of Brandt's elegantissima. 



