118 
CLASS II.— ORDER I. 
RIGID. 
10. Galaxaura rigida. Articulations invisible ; 
branches stiff and brittle, marked with transverse 
rings; rings covered with a row of straight short 
hairs ; colour reddish green ; height one or two cen- 
timetres. — Plate 8. fig. 4. a. B. 
On the Thalassiophytes of the Indian seas. 
LICHEN-FORMED. 
11. Galaxaura lichenoides . Branches continuous, 
a little wrinkled, and flattened at the extremities. 
Coasts of the Bahamas. 
janian. 
12. Galaxaura Janioides. Stems in tufts ; branches 
dichotomous, filiform, slightly articulated, with a 
strong resemblance to those of the genus Jania ; height 
about two centimetres ; colour whitish, tinged with a 
grey violet. 
Australasia. 
