Grif fith sia Borne tl ana becomes conspicuous at V^ood's 

 Hole in the fir'st half of July, and grows rapidly until it 

 reaches its maximiim development ahout the first week in Au- 

 gust, Tov/ards the middle of August the plants of all ages 

 cease to produce new branches and slov/ly become disorgan- 

 ized, losing their rich pink color and becoming easily de- 

 tached fro.'.i the substratum. At this season great quantitioc 

 are washed up on exposed points like iTobska Point at Wood's 

 Hole, After being torn loose from their fastenings, the 

 plants float about in the water for days or even weeks, con- 

 tinuing to produce spores v/hich were shown by experiment to 

 "be capable of geriaination. At this season, the tetrasporic 

 plants frequently show a very robust feabit, forming spher- 

 ical masses upwards of 15 centimeters in diameter. 



The spores develop quite rapidly in the open. Bits 

 of cotton cloth, tied to piles near mature plants showed 

 in two weeks' time sexual plants v/ith ripe antheridia and 

 carpospores, and tetrasporic plants with mature spores. 

 The largest of these plants shov/ed 3 orders of branching, 

 and consisted of as many as 500 cells, 



A notevforthy fact about the occxurrence of the vjirious 

 forms is that tetrasporic plants are always more abundant, 

 as well as on a.n average larger tlian sexual plants. Dviring 

 the first two weeks of August, 1907, mcire than 500 plants 



