176 University of California Publications. [botany 



forms is not sufficient to allow us to include them. The species 

 of the fresh waters and of damp localities removed from the im- 

 mediate shores, but only within a few miles of the coast line, 

 have been included, because the materials are available and often 

 come into direct connection with the account of the marine 

 species. Much more work needs to be done upon both classes of 

 alga? in this territory and it is our purpose to continue, regard- 

 ing the present account as tentative and preliminary. 



CITATIONS. 



In citing, whether it be generic or specific names, localities, 

 or references in the various published writings or published ex- 

 siccata?, we have tried to follow a conservative and, as we hope, 

 an intelligible course. We have followed largely the order and 

 nomenclature of the Engler and Prautl System, departing from 

 it only where it seemed absolutely necessary. In the use of 

 generic names, we have followed usage rather than strict priority, 

 holding that a name which has been recognized for a quarter of 

 a century, or thereabouts, is to be considered fixed and not 

 to be unsettled simply because another may have been pro- 

 posed earlier, but hitherto neglected for good or even for 

 no real reason. We have preferred to devote our time to 

 the study of the plant itself. In the case of specific names, 

 we have been unwilling to unsettle a name of this rank, 

 which has been long in use, unless the earlier name is so 

 plainly applicable that there can be absolutely no doubt as 

 to the application. Where it has become necessary to unite a 

 series of proposed species, then the earliest name of undoubted 

 application has been chosen and this has also been done in the 

 case of some species, recently proposed but not yet fixed in the 

 literature. We have not attempted to give a list of citations 

 under each species, but have only cited such references as be- 

 came necessary to indicate what is meant, or to give our author- 

 ity for mentioning it as occuring in certain localities. The list 

 of localities under each species has been made as full as our 

 knowledge has permitted and in each case, the name of the col- 



