128 
tions or by purchase, many have reached our herbarium in the 
past few years through exchanges. American (and sometimes 
foreign) material has been received in this way from W. G. Far- 
low, F. S. Collins, W. A. Setchell, D. A. Saunders, J. Macoun, 
W. D. Hoyt, and others ; Japanese specimens from K. Okamura 
and S. Yamanouchi ; New Zealand specimens from R. M. Laing; 
Fic. 20, Growing apex of the Great oe [Alacrocystis a (Turn. ) Ag. ]. 
ma Californian specimen. About one third natural size his plant is said to 
attain a length of several hundred ee t. 
material from Denmark, Iceland, Greenland, the Faeroes, and 
the Danish West Indies from F. Borgesen ; Barbados specimens 
from A. Vickers ; Ceylon specimens from N. Svedelius ; algae 
from the Dutch East Indies from A. Weber-van Bosse ; algae 
from various islands of the South Pacific from Th. Reinbold; 
fresh-water algae of Sweden from O. Nordstedt ; Corallinaceae 
