21 



in vegetative cells of vsjfious ages, in the hair-cells of 

 the procarp and cystocarp, in the primary tetrasporic cells, 

 in the stalk cells of the tetrasrorangia, in the involv.cral 

 cells of the tetraspore-sorus, in the sporelinrs froM tet- 

 raspores, and in the sporelings from carpospores. 



No undoubted cases of amitosis have "been observed. An 

 appeara-nce suggesting amitosis ha.s been noted in the stalk 

 cells of the tetrasporangium and in the cells of the spor- 

 ogenous lobes, and ma.y possiblj^ occiu^ in t}ie vegetative 

 cells; but the small size of the nuclei renders exact ob- 

 servation on tjiis point very "difficult . It may be said 

 v/it?i confide-n.ce, hov/ever, that the usual mode of nuclear di- 

 vision is by mitosis. 



It may be well to compare at this point the beha,vior 

 of the nuclei in division v.dth those of Polys i phonia (yAI.TA- 

 jSrOUCHI) and ITemalion (WOLPE) , the t./o other red algae v/hich 

 have been carefully studied from the cytological stand- 

 point , 



