Nuclear Division in Funkia. 
395 
11) A double structure is kowever found in tbe prophases of 
the somatic nuclei and the somatic chromosomes ave often found 
lying togetber in pairs. These facts suggest that tbe close associa- 
tion of paternal and maternal chromatin, necessary for tbe pairing 
of bomologous parts in tbe prophases of the heterotype, is in Funkia 
also in existence througbout tbe life of the plant. A pair of somatic 
chromosomes, such as seen in Figs. 4, 7. PI. VIII., is obviously tben 
tbe exact counterpart of a bivalent ckromosome of the heterotype 
division, in wkick kowever there bas recently been intimate Con- 
nection between the two members, in tbe fused spireme stage. 
12) Of tbe five nucleoli usually present in the resting stage of 
the nucleus it is tkought that two or three are absorbed into tbe 
reticulum before synapsis; the remaining two fuse togetber during 
synapsis, and altliough coming into contact with tbe spireme and 
chromosomes, yet persist tili the latter are fully mature and do not 
disappear tili the time of tbe formation of tbe multipolar spindle. 
Two to three nucleoli only are found after reduction division, botb 
in tbe prophases of the komotype and in tbe pollen grain nucleus. 
Botanical Laboratory Cambridge, November 1907. 
Bibliography. 
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