April, 1019.] 



THE GERMINATION AND DEVELOPMENT. 



83 



the scraped sample in Flemming's solution with additional 

 acetic acid. The scutellate root of our sporelings and the long 

 strand form of those of twig-porph^-ra or of those epiphytic on 

 a soft alga, are undoubtedly to accomodate to the substrata. 



Okamura did not doubt that the sporelings he has illust- 

 rated have germinated from the carpospores. So did I not 

 when I was observing them on my material. 



In Februarj'-March, when P. leucosticta on the rocks 

 around the experiment block was in full growth, the block was 

 carefully examined. The plant was richly found on the lowest 

 zone of the slant side as well as on the lowest terrace. The 

 second lov\est terrace was rather poorly vegetated with the 

 plant, and the higher ones had no trace of it. On the knobs, 

 the plant was mostly absent on the side which faces to the 

 surfs. There was luxuriant growth of Ulotrtx suhBaccida on 

 the higher levels so richly that the entire surfaces of the zones 



?6 



^- 



Fig. 2. The block as seen on April 3. 1918 ; view toward the west. On ll'.c 

 foreground and the lowest terrace, luxuriant growth of Pnr'pliyra letico- 

 sticia var. suborbtculafa is seen. On tiie second lowest terrace the plant is 

 rather sparing. The dark shade of the slcici is Ulolhrix snhfiaccida. 

 The knobs are naked on the side which fronts to the surf. 



