PLATE 3 



EXPLANATION OF FIGURE 



7 Stellate connective tissue cells from the fins of four embryo fish, I-IV 

 exhibiting rapid change of form. Owing to difficulties of observation it is not 

 possible to make drawings oftener than at 1 to 3 minute intervals; hence, the 

 actual changes of form were much more frequent than the record shows. A-K. 

 nine connective tissue cells. Numerals as in the preceding figures. 



146 



