UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



BOTANY 



Vol. 8, No. 2, pp. 139-374, plates 9-33 July 14, 1920 



THE MARINE ALGAE OF THE PACIFIC COAST 



The second part of the Marine Algae of the Pacific Coast of North 

 America, comprising- an account of the Chlorophyceae or Green Algae, 

 succeeding an account of the Myxophyceae, is presented without intro- 

 duction or explanation, pending the publication of the other two 

 parts which are in advanced preparation. It is intended to issue 

 with the completed volumes a statement as to the principles followed, 

 methods used, territory covered, sources of information, material, 

 etc., as well as to make acknowledgment to the various authorities, 

 students and collaborators who have been of the greatest assistance 

 in carrying out the long and laborious task. 



W. A. Retchell and N. L. Gauoner. 



lai-Lcr UKin^ eiuier sepiaic V^-*^v piuviueu wiLii |jarLinuiiH, ctrs m Liie 



Siphonocladiales) or destitute of septa (as in the Siphonales), and 

 ranging in size from microscopic forms to individuals of more than a 

 meter in at least two dimensions; cell walls varying in structure and 

 composition, mostly of cellulose but sometimes largely of pectose, 

 occasionally more or less externally mucilaginous, generally simple, 

 moderately thick and structureless, but at times thick and variously 

 stratified, occasionally incrusted with lime ; nuclei well developed ; 

 chromatophores usually distinctly differentiated, of varying shape 

 and number, often containing starch centers, or pyrenoids, and 

 colored bj' chlorophyll and xanthophyll, the former usually in excess ; 

 reproduction vegetative, by non-sexual spores, and by zygotes ; vege- 

 tative reproduction by cell division, fragmentation, and by gemmae 



