I have had some hesitation in referring the curious species 

 here figured to Cladophora, on account of the decided tendency 

 to anastomosis among the ramuli, a tendency that increases with 

 the age of the plant, and in full-grown specimens (if ours be, as 

 I suspect, immature) would probably be more strongly indicated. 

 The anastomosing ramuli show an affinity with Microdictyon, 

 and consequently with the ValoniacecB ; but the character is not 

 so decided as in Microdictyon, and the nature and ramification of 

 the filaments are very similar in this plant to what they are in 

 Cladophora composita, and several other undoubted species of 

 that genus. On the whole, therefore, I prefer leaving C. anasto- 

 mosans in Cladophora until some better place be found for it. 



It is a deep-water plant, and as yet very rare. The only spe- 

 cimens seen were picked up after a gale, on the shore, near Swan 

 River. It has not yet been sent by Mr. Clifton ; another proof 

 of its rarity. 



Fig. 1. Cladophora anostomosans, — the natural size. 2. A young frond, - 

 magnified. 



