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THE BRYOZOA OF THE EXPEDITION 



BY ALICE ROBERTSON 



The following report is based on the Bryozoa obtained by Pro- 

 fessor W. E. Ritter, of the University of California, while in 

 Alaska as a member of tlie Harriman Alaska Expedition dur- 

 ing the months of June and July, 1899. The localities at which 

 collections were made are : Muir Inlet, Garforth Island, Sitka, 

 Juneau, Yakutat Bay, Prince William Sound, Kadiak, and 

 Fakir Islet. There are in all thirty-seven species, five of which 

 are new. These contain representatives of the three divisions 

 of the Ectoprocta, one of the Entoprocta, and one of the fresh- 

 water forms. I have adopted the system of classification which 

 is given by Hincks ('80). As may be seen by perusal of the 

 list of species, the Bryozoan fauna of Alaska is essentially 

 arctic, consequently the work of Smitt ('65-68), who has made 

 such a complete study of northern forms, has been of invaluable 

 assistance. In order not to crowd the text unnecessarily, and 

 at the same time to make clear what form is intended, the 

 synonymy includes, as a rule, only the specific names of these 

 two writers, and the foreign distribution is given mainly upon 

 their authority. 



[315] (223) 



