IP s t e I s i a 



233 



from the island, fifty-four are common to Eu- 

 rope, forty-three to New England, forty-six to 

 Alaska and forty-three to California. Of the 

 seventeen species which do not grow in Europe, 

 two (Diplophylleia plicata and Scapania Bolan- 

 deri) have been found in Asia, one {Scapania 

 Evansii) has a rather wide American distribu- 

 tion, while the remainder seem to be confined 

 to the Pacific Coast regions of North America. 

 These include the following: Gyrothyra Under- 

 wood la )i a, Odontoschisma Gibbsice, Lepidozia fil- 

 amentosa, Blepharostoma arachnoideum, Ptili- 

 dium calif ornicum, Scapania americana, Radida 

 Bolanderi, Porella navicidaris, P. R«llii, Frid- 

 lania Bolanderi, F. calijornica, F. franciscanay 

 F. nisqiiaUensis, and Authoceros jiisijormis. 



