vol.i] Setchell- Gardner . — Alga of Northwestern America. 177 



lector, or of the author recording it as from that locality, has 

 been given, following the usual method of citation in each in- 

 stance, to agree with the list of authors and their works appended 

 to this account. In case of the collections which are extensive, 

 only the initials of certain collectors have been printed, but these 

 will be plain from the paragraph entitled "Collections". The 

 names of the localities have been given in accordance with the 

 best authority known to us and have been arranged, in general, 

 from north to south. In some cases, however, this has been de- 

 parted from, but, as we think, without being liable to cause con- 

 fusion. The specimens cited as having been examined by us, 

 are, with very few exceptions, preserved in our own collections, 

 at present deposited with the Herbarium of the University of 

 California. 



ACKNOWLEDGMENTS. 



We desh-e to make acknowledgment of the great assistance 

 we have received from many sources in the prosecution of our 

 work. To all of the collectors, officials, and corporations men- 

 tioned in the paragraph on "Collections", we return our sincerest 

 thanks. Without the aid of these, it would have been impossible 

 to accomplish anything whatsoever, in the large task we had set 

 for ourselves, Some several thousand specimens have been pro- 

 vided through the generosity or personal effort of those men- 

 tioned, which have enabled us to clear up many points which 

 seemed beyond hope. To Mr. Frank Shipley Collins of Maiden, 

 Mass., we are indebted for the determination of nearly all of the 

 Chlorophycese and for invaluable assistance at many other points. 

 Through Mr. Collins, we are very much indebted, also, to Dr. 

 Tracy Elliot Hazen, for assistance in determining various Cha?- 

 tophoraceas and Ulothricacea?. We desire to thank Professor P. 

 R. KjeUman of Upsala, Sweden, for examinig a set of our Alarise 

 and returning specimens and notes for our guidance. We feel 

 very grateful to M. Foslie, Esq., of Trondheim, Norway, for 

 similar services in connection with our crustaceous Corallinacea?. 

 Professor George Davidson, of the University of California, has 



