branches, and long and short branches are intermixed without order. 
Branches and branchlets alternate or scattered, linear-lanceolate, much con- 
stricted at their insertion and tapering to an acute point, the larger ones 
with an obscure midrib. ‘The cellular structure of the intermediate layer of 
the frond is much laxer than in other species of the genus. Cystocarps are 
immersed in the smaller ramelli, below the apex, and are either solitary or 
in pairs; they consist of strings of spores radiating from a centre. Tetra- 
spores have not been observed. The colowr is a very deep blood-colour, 
becoming rather brighter if kept in fresh water, but turning dark if dried 
without previous steeping. Substance cartilaginous and rigid. In drying, 
the frond does not adhere to paper. 
This pretty species of Areschougia is allied, on the one hand, 
to A. australis, from which its small size, as well as internal 
structure, separate it, and on the other to 4. Laurencia, from 
which it differs by its strongly compressed almost flattened 
branches and ramuli. Its discovery is due to Mr. C. Stuart, 
who gathered it, with many other interesting Algz, at Southport, 
Tasmania, where, judging from the number of specimens sent, 
it would seem to be not uncommon. Mr. Stuart’s meritorious 
explorations of Australian botany, both marme and terrestrial, 
worthily entitle him to the compliment gratefully bestowed on 
him in the specific name. 
Fig. 1. Arescnouaia Sruartii,—the natural size. 2. Portion of the frond, 
in fruit. 38. Cross-section of a branch. 4. Cross-section through an im- 
mersed cystocarp. 5. Strings of spores :—variously magnified. 
