Postelsia 
iS) 
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- 
dert) have been found in Asia, one (Scapania 
Evansi) 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- 
woodiana, Odontoschisma Gibbsie, Lepidozia jil- 
amentosa, Blepharostoma arachnoideum, Ptili- 
dium calijornicum, Scapania americana, Radula 
Bolanderi, Porella navicularis, P. Rellii, Frul- 
lania Bolanderi, F. californica, F. jranciscana, 
F. nisquallensis, and Anthoceros jusijormis. 
