Sfb to 72e il?.u?trp.tr riirirl in vn.rionc rtr-rop of a'"itntic 

 division, rrerue'-tly ir oollr. vhere^'^itorAz takes ■^'^r.ce 

 nr'^y of the yell- frro-^ules hove been ripester! end r-onse- 

 ciiertly are ferer thar^ in cells v.-here dir:eEtio- is less 

 active. It ray be that the r.orr active functions of dipes- 

 tior and the rhenc-era of direct cell divisic^ are associated 

 v.'ith each other. Tr it ray be that the vie- of Flerrinp and 

 Ziep:ler, that amitosis is connected viiVn a hiph S'^ecial- 

 ir.ation of the cell or is the foreriin'^er of dep:eneration, ar- 

 nlies i-" this case. This latter conception sec-s nlaus- 

 able, fcr v;e find aritosis to be r^ost abundant shortly 

 before the cell bou!"dariesrJsar»'^ear a^d 'he enbryo is 

 transformed into the syncytiur. 



For a nurber of years it has been lrnor;n that anitosis 

 is cordon i- follicle cells, digestive epithelial cells, 

 su'D^ortinr' cells, etc.: but generally it was -ot su'r^'^csed 

 to take riace in early e-bryonic develor>-ent, V.'ithi- the last 

 fe'v years however a number of observers have discovered this 



