2JeUiformis, from which it chiefly differs in its attenuated fronds 

 and general depauperation of all characters. As yet no one 

 has gathered it except Dr. Ferdinand Mueller, to whom I am 

 indebted for the specimen here figured. So far as known, it 

 is one of the rarest and most local of the Australian species. 



Pig. 1. Catjlerpa remotifoliAj — the natural size. 2. Frustule, somewhat 

 enlarged. 



