26 
THE SEAWEEDS 
C. coliformis : Cells inflated, but not as large as in preceding, 750 ^ 
to 2,000 ix long, H-3 times as long as broad. 
C. aerea : Cells small, 150 fx to 500 ^ long, cylindrical, slightly con- 
stricted, from 1-2 times as long as broad. 
C. Darwimi is a handsome form, growing in strings of glistening pearls, 
and conspicuous among the other algae of the rocks. C. aerea is slender 
and wire-like. 
Pig. 9. — Chaetomorpha aerea. 
