UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



BOTANY 



Vol. 6, No. 17, pp. 455-486, plates 38-41 



December 3, 1918 



NEW PACIFIC COAST MARINE ALGAE III 



BY 



NATHANIEL LYON GAEDNER 





Anacystis elabens (Kuetz.) Setchell et Gardner comb. iiov. 



Plate 38, figs. 6, 7 



Young colonies globose, later becoming much flattened and irregu- 

 larly lobed, 60-100/i, diam. ; cells oblong, 3-4. 5;^ diam., l/x long, cell 

 wall thin, protoplast aeruginous or olive-green, tegument moderately 

 thin and firm. 



Growing among other algae in tide pools. Pacific Beach, near 

 San Diego, California. Collected by Mrs. M. S. Snyder. 

 Polycysiis elabens Kuetzing, Sp. Alg., 1849, p. 210. 



This is the only species of the genus growing either in fresh or 

 in salt water that has been discovered on the Pacific coast of North 

 America, and the above collection is from the only known locality 

 from which it has been reported. 



The cells of the colonies appear to separate into groups when they 

 are nearing the stage of maturity (pi. 38, fig. 6). but our material 

 does not show the groups with a distinct envelope as Kuetzing figures 

 for the species. (Kuetz., Tab. Phyc, vol. 1, pi. 8.) 



The genus Anacystis was published by Menegliiui in 3 837 and has 

 generally been subordinated to Microcystis of Kuetzing published in 

 1833, but which is clearly a synonym of Euglena of Ehrenberg 

 (1832?). Later it has been subordinated to Polycystis Kuetzing, pro- 

 posed about 1845 and consequently distinctly later than the genus of 

 Meneghini. It seems, therefore, necessary to adopt the name of 

 Anacystis for the genus and to refer to it this species long ago 

 described. 



