mens, and becoming dark-brown or black in drying. Substance cartilagi- 

 nous, rigid when dry, in which state the frond does not adhere to paper. 

 The/n«Y has not been observed. 



This rare species is readily known from other AustraHan Gi- 

 gartincB, by its channelled stems and branches, and the strongly 

 inrolled apices. In these characters it agrees with G. alveata of 

 New Zealand, but differs from that species in being pinnately 

 decompound and not dichotomous and fastigiate. Whether mere 

 ramification in this case be a persistent character remains to be 

 proved. It is not impossible that the same species may appear 

 (as often takes place among Ferns) in a dichotomous and in a 

 pinnated form ; and I have sometimes feared that G.jlaheUata 

 and G. pinnata were not permanently distinct. Should that be 

 estabhshed, the present plant may then be, perhaps, regarded as 

 a pinnated variety of G. alveata. 



Fig. 1. GiGARTiNA ANCISTBOCLADA, — the natural size. 3, 3. Small portions 

 of the frond, enlarged, i. Transverse section, highly magnified. 



