and the spores are broadly obovoid. The colour, when fresh, is an olive- 

 brown ; when dry, black. The substance is brittle. 



The genus Cystopliora is peculiar to the Australian coasts, and 

 includes a considerable number of species, among the nobler 

 forms of the Fucoids. It represents Cystoseira of the northern 

 hemisphere, differing chiefly in the position of the vesicles; and 

 is also allied to the cosmopolitan Saryassum, from which the 

 position of the receptacles, and the filiform, ultimate segments 

 or " leaves " distinguish it. 



The species now figured was discovered by Dr. Mueller, and 

 has been found in two distant localities of the southern coast. 

 It is well distinguished from all previously known species by the 

 very numerous egg-like vesicles, forming a sort of raceme at the 

 base of the smaller branches. Our figure represents a lateral 

 branch of a specimen three feet in length. The plant occurs 

 commonly in Port Phillip. 



Fig. 1. A branch and part of the stem of Cystophora botryocystis, — the 

 natural size. 2. A receptacle. 3. Cross-section of the same. 4. A 

 spore : — the latter figures magnified. 



