28 BOTANICAL GAZETTE [janua^y 



Fig. 10. Group of daughter chromosomes vacuolized, the upper side, for 



merly the pole, being concave. 



Fig. II 



figure; arrangment 



formation 



:gul 



cell plate has appeared in middle region of central spindles. 



formation 



appeared in the previously polar 



region. 



Fig. 14. Polar view of daughter nucleus in later stage than that shown in 

 previous figure; nucleoli apart from chromatin material. 



PLA TE II ' 



Sporogenesis 



spore 



cnromatm reticulum without any regularity, looking ragged; three nucleoli are 

 present in this section, some of them vacuolate. 



Fig. 15a. Portion of chromatin reticulum of previous figure under higher 

 magnification; reticulum consists of ir^efnl1;^r rlnmnc anrl cl^r,ri^^ cf^on^c mVino- 



aspect 



Fig. 16. One of three sections of a nucleus in which is showTi the tendency 

 to form the thread structure from a rearrangement of the chromatin reticulum; 

 a single nucleus is seen in this section. 



reticuhun from fig. 16 imder higher magni 



Fig. 1 6a 



fication; by the disappearance of some of the strands and elongation of ragged 



formed; these threads from the outset independent 



betrins 



um, almost transform 



fig. 17 under higher magnificat 



Fig. iS. Synapsis; nucleolus caught in the contracted mass of thread at a 



position 



Fig. 19. Portion of the separating threads from a tangential section, the nest 

 to that shown in fig. i8, under higher magnification . 



Fig. 20. The nuckus emerging from s}Tiapsis; uncoiled parts of the spirem 

 show the longitudinal splitting or separation of two threads which entered into 

 dose association in synapsis. 



Fig. 21. Spirem shortened, thickened, and more" uncoiled; line of longitudi- 

 nal sphttmg or separation visible; kinoplasmic fillers present surrounding the 

 nucleus, circumscribing the rnTTtnomfKroi,^ ^i^«^ ™ .t_ 



preceding stage shown in fig 

 membrane. 



irre 



r^ 



be^segmented; tR-o halves of the spirem ahnost equally thickened and 



mn 



a^^s 



irregularly 



