The frond, in this species, secretes much less calcareous mat- 
ter than in most others of the genus, being nearly as soft as in 
Liagora, to which genus it might be referred with nearly as 
much propriety as to Galavaura; indeed it may be regarded as 
a connecting link between these genera. I refer it in preference 
to Galaxaura, because of its obvious affinity with G. marginata, 
which in the young state produces terete tomentose fronds. In 
our present plant such continues to be the mode of growth to 
maturity, without any disposition to form the flattened, smooth 
branches which mark the mature stage of @. marginata. 
Fig. 1. Frond of GaLaxaura CLIFTONI,—the natural size. 2. Portion of an 
upper branch. 3. Longitudinal section of the frond. 4. Forked peripheric 
filaments :—magnified. 
