83 
the surfaces of rocks, and green or red in color. Closely related 
to these is the red snow of the Arctic regions. 
The higher forms of the Algae are much larger than the lower 
brown, green and blue-green. Many of 
the species among those exhibited are popularly known as sea- 
One he more curious seaweeds is Mereocystis, the bladder 
kelp or sea-otter’s cabbage, a native of the Pacific Coast, ranging 
from California northward. It grows attached to rocks, com- 
e root-like attach- 
ich grow eis fronds which become many 
t-lik tt and the struc- 
ture just below it develops into a cask- like body about six feet 
long and six inches in diameter. It is said that on the coast of 
Alaska the ae has a habit of resting on this structilte; toss- 
draining their boats of water and sometimes as fish-lines. 
ge speci of the rockweeds, Fucus and eee are 
exhibited. These are the plants which in our latitude far 
ther north, constitute the more conspicuous e en 
the tide. 
known as oa : , fro in One species 
of this genus, Laminaria saccharina, yields a quantity of a sort 
of sugar (mannite), whic gions is used in 
syrup k ockwe ere at one time the principa 
source of the soda and iodine of commerce. In Scotland, espe- 
uk the oa industry about a hundred years ago was 
ortant one, 
e Irish moss, Chondyus crispus, one of the red kinds, is 
about the only seaweed of our coasts which has a eguimetcial 
