angle, numerous parallel filiform leaflets, which continue to the margin, and 

 end each in the top of one of the marginal teeth ; these are connected by sub- 

 parallel cross bars, which are again irregularly connected by one, two, or 

 three series of lesser bars ; and the net is then completed. The meshes are 

 of irregular shape, and acutely angled. The colour {•& a full-lake. The sub- 

 stance is membranaceous, and the frond adheres closely to paper in drying. 

 ^0 fructiJicaUon has been seen. 



Of this beautiful and curious species I have seen but a single 

 specimen, of which the upper figure in our Plate is an exact 

 facsimile as to form and size. It is obviously only in a young 

 state, and probably the fully developed frond would be of diff'er- 

 ent shape and considerably larger. Its characters are, however, 

 so strongly marked, that its specific entity cannot be questioned. 

 From the other species of Claudea {C. elegans and C. muUiJida) 

 it is at once known, besides other characters, by the decussate 

 pattern of its reticulation. In the pattern there is more resem- 

 blance to Vanvoorstia spectabilis, but the evolution is distinctly 

 that of a Claudea, not of Vanvoorstia. 



The specific name is bestowed in honour of my valued friend 

 Dr. George Bennett, of Sydney, well known as an accomplished 

 naturalist, and from whom I experienced much kindness during 

 my visit to New South Wales. I trust the publication of this 

 figure may lead to further information respecting this very re- 

 markable and, at present, unique Alga. 



Fig. 1. Claudea Bennettiana, — the natural size. 3. A portion of the net- 

 work, — magnified. 3. A small fragment, — more highly magnified. 



