140 A CYTOLOGICAL INVESTIGATION OF SOME SPECIES 
that the chromosomes do not lie exactly in the aequatorial plane. Part- 
ly this can be caused by the fact that certain chromosomes are no lon- 
ger paired in gemini, but already are at the beginning of anaphase; one 
sees however also chromosomes in or somewhat outside of the aequator 
which are smaller than the gemini, which have an almost round shape 
and which have remained single. 

Fig. 36. Fig. 37. 
Fig. 36. Diakinesis of Green German New Guinea (irregular division) x 2300. 
Fig. 37. Metaphase of the heterotype division of G. G. N. G. (irregular divison) 
x 2300. 
These are univalent chromosomes, which in diakinesis remained un- 
paired. In fig. 37 one sees 3 of these a little below the nuclear plate. 
The chromosomes in the nuclearplate itself clearly show the geminus- 
shape, all of them consequently are bivalent. 
Observing anaphases of G. G. N. G. we notice, that between the two 
groups of chromosomes moving towards the poles some chromosomes 
are present which lag behind and frequently are still in the proximity 
of the aequator. Frequently one sees that these sluggards split into 
two almost equal parts. Comparing the size of the chromosomes lag- 
ging behind with those of the chromosomes approaching the poles, we 
see that in general the unsplit sluggards have the same size as the chro- 
mosomes near the poles; after splitting, the halves aresomewhatsmaller. 
