14 



The divisions of the nuclei of a sincle cell near the 

 apex are almost, tliough not quite simultaneous (fig. 12 ). 

 In general, the nuclei near the apex of the cell are at a 

 slightly more advaaiced stage of division than those near 

 the base .' . For instance, tlie nuclei near the ape:. 

 ma.y shov/ stages of anaphase, or even of telopiiase, v/hile 

 those in the middle region of tlie cell are at metaphase, 

 when the nuclei near the base have reached only the condi- 

 tion of prophase, (fig, 13). V/iaen tliere is an accujnula.tion 

 of protoplasm in the apex of the terminal cell preparatory 

 to cell division, the ni^clei in this protoplasmic mass may 

 divide considerahlj- before the nuclei of the lower part of 

 -the cell. In the older cells the nuclei do not shov,' the 

 same simultaneity of division. Here small groups of nuclei 

 may undergo mitosis while the majority of nuclei are in the 

 resting condition. In the younger cells, however, when one 

 nucleus divides, all divide, though not exactly synchronous- 

 ly. 



In this connection, it is interesting to note the be- 

 havior of the nuclei in the multinucleate cells of other 

 plants. In the sexua.1 organs of various Phycom^z-cetes, the 

 numerous nuclei divide a.t the Scune time, as in the oSgonium 

 of Saprolegnia (DAVIS, *C3), in the oOgonia and antheridia 



