IQI2] 



YA MA NO UCHI—C U TLERIA 



475 



Later this filament does not continue in the upward direction, but 

 there appears a new lateral structure near the basal region of the 

 primary filament, and the 



■ 



whole structure clings to the 



substratum 



with 



rhizoids 



which grow from the base; 

 thus, contrary to the behavior 

 of the fertilized gamete of 

 Cutleria, basal 



expansions 

 that creep flat upon the sub- 

 stratum are never found. 

 The plant at 30 days is illus- 

 trated in fig. 15, b, which 

 resembles the young Cutleria 

 as found in nature. 



The new structure thus 

 initiated laterally from the 

 basal region of the primary 

 filament grows in such a way 

 that it finally meets the other 

 side of the primary filament 

 so as to form a funnel which 

 is expanded upward and nar- 

 rowly constricted downward. 

 Upon the expanded upper 

 margin of this funnel-shaped 

 structure delicate hairs begin 

 to grow. This stage is reached l ( 

 in about 40 days (fig. 15, c). 



These funnel-shaped struc- Hn s s > 

 tures obtained in the artifi- 



Fig. 15. — Aglaozonia reptans: zoospore- 

 a. 20 days after germination; b, 30 



germination; c, 40 days after 



germination; the sporelings are filamentous 



Cial Culture present a Striking i n primary growth as shown in a, then 

 resemblance to the young gradually assume the funnel-shape shown 

 Plants of Cutleria in nature ^ 6 and c, this shape being characteristic of 



as they occur in tufts on the 



rock or on shells. One difference is that the young plant of 



Cutleria in nature, at the same stage as the cultures in the 



the young stage of Cutleria in nature. 



