80 
CLASS I. — ORDER II. 
DISTANT. 
10. Dynamena distans . Cells very distant from 
each other, with border entire ; colour whitish, and 
a little transparent ; height about one centimetre. — 
Plate 5. fig. 1. a. B. 
On the fucus natans and other marine productions 
of the Atlantic. 
TURBINATED. 
11. Dynamena turbinata . Root rampant; stem 
simple, and upright ; cells rather long, with a wide 
open mouth, and border entire ; colour, a yellow fawn ; 
height about one centimetre. 
On the Australasian fucus. 
DIVERGENT. 
12. Dynamena divergem . Stem flexuous; branches 
diverging, and alternate, almost at right angles with 
the stem ; cells with a toothed border ; colour, yellow 
fawn; height a centimetre.— Plate 5. fig. 2. a. B. 
On the fucus of Australasia. 
BIFORM. 
13. Dynamena disticha. Stem simple, upright, 
and articulated ; cells scarcely visible, almost trian- 
gular, with the extremity curved. 
On the fucus natans. 
MARINE. 
14. Dynamena pelagica. Stem composite, and 
flexuous ; branches alternate ; cells tubular, with an 
horizontal border. 
On the fucus natans. 
