22 



lubricous. In drying the plant closely adheres to paper. 



Hab. : On rocks or stones between tide marks extending to 

 low tide. (4-11 fath.) Pacific coast from Kagoshima to Matsu- 

 shima (Prov. Rikuzen), and Prov. Idzumo, Tango and Noto. Chip- 

 pen (Chosen). Fruits : Spring early summer. 



Harvey in /. c. remarks under Helminthocladia australis " My 

 only doubt respecting it is, lest it should not be sufficiently distinct 

 specifically from H. piirpurea itself, which is a very variable 

 plant, and to some of whose varieties our plant bears considerable' 

 resemblance. In general, there is more difference in diameter 

 between the main stem and its branches in the European \H- 

 purpurea\ than in the Australian plant [//". australis]" Accord- 

 ing to his opinion I refer the present plant to H. australis. It 

 would be proved, however, in other days, to be natural to unite 

 the two related plants in one and the same species. A form 

 hiving much slender branchlets, as shown in the lower portion of 

 PL. CLVI, I think to be a form stunted from the cause of its 

 localities where terminal flow of cold current visits. 



PL. CLVI. Fully grown frond of Helminthocladia australis Harv.; below 

 with a portion of frond having much shorter and slender ramuli, l/i. 



PL. CLVII, fig. 7-21. Fig. 7: longitudinal section of frond, 13 . Fig 

 8 : peripheral filaments bearing a procarp, -^>. Fig. 9 : young peripheral 

 filament bearing a hair, h, ^p. Fig. 10: antheridia, 5J. Fig. 1115: 

 different forms of procarps, 3.36. Fig. 16 : procarp (a-d) producing spore- 

 filaments (e f and gh),^. Fig. 17 19 : beginning of cystocarp-formation, 

 &Sfi. Fig. 20: portion of young spore-filaments,^^. Fig. 21: young 

 spores, 



