•■•*•»■ ■ f 



-'Ji^ ..-."■'' ^" ?V'.-- "v?.*. "''i.. ''-V-*'-.-....., 



•^ oi -T'-Vv,. -.'{^s-. 'V.,-.;. 

 -■<" .^ i'^ ->' ;? * ^- T ^'V ^ • ■'. 



^^ 



B 



Fig. 204, A-E. — Development of axiate pattern in Polys pondyliiim. A, directed stream- 

 ing and aggregation of myxamoebae and beginning of axiate development at a; B, origin of 

 branches from masses of amoebae successively constricted from basal region of sorogen and 

 "left behind" as elongation continues; C, fully developed, unbranched individual; D, E, 

 branched individuals (after R. A. Harper, 1929). 



