138 
L. Digby 
8. Each chromosome of the premeiotic and meiotic divisions is evolved 
in portions, and these only join together to form the completed chromo- 
soine, prior to the indication of the spindle. Conversely, one or more 
chroniosomes may scgment transversely at anaphase, thus causing the 
chromosomes to appear more in number than the six typical of the 
somatic divisions, and the three of the meiotic divisions. 
In conclusion I vrish to express my thanks to Professor J. Bretlaxd 
Farmer for the valuable advice and criticism that he has given me 
throughout the course of this investigation. 
Eoyal College of Science, London. 
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