shines with somewhat of a glassy lustre. The substance is crisp and rigid, 

 and the branches stand apart by their own rigidity when the tuft is re- 

 moved from the water. In drying it very imperfectly adheres to paper. 



The genus Cladophora, as at present limited, is a very exten- 

 sive one, everywhere dispersed, and containing a multitude of 

 forms or varieties, so difficultly distinguishable, that we hardly 

 know where one "species" ends, or where another begins. 

 Whether the fine " species " here figured be really distinct from 

 all others, or only " a remarkable variety," remains to be deter- 

 mined. I content myself with knowing that it is different from 

 any other Australian form yet published. If compared with the 

 Australian named kinds, it will stand nearest to C. Bainesii, 

 Muell. and Harv., than which it is much larger, stronger, and less 

 soft ; and if with the European, it will be nearest to C. jpellucida. 



I have given it the name of Rev. J. Fereday, of Georgetown, 

 Tasmania, from whom, during my stay in his neighbourhood, I 

 experienced much kindness, and who was very frequently my 

 companion in "weeding'" expeditions, in which he introduced 

 me for the first time to the habitats of Claudea elegans, and of 

 many other interesting Algae. Without his assistance in guiding 

 me to the best localities for the Algae, and the advantage derived 

 from the use of his boat, I should have greatly failed in my ex- 

 ploration of the Tamar. 



Fig. 1. Cladophora Feredayi,— the natural size. 2. Portion of a branch, 

 with fascicles of ramuli. 3. Articulations from a ram ul us : — both figures 



variously magnified. 



