THE MAIOTIC PROCESS IN MAMMALIA 
87 
Ihe reduction of the number of chromosomes in the second maiotic 
figure is brought about by this peculiar mode of association and separation. 
trom the first inception of the maiotic change peculiarities are seen in 
relation to the attraction sphere. Archoplasmic vesicles appear. The 
centrosomes take up an extra archoplasmic position, and may acquire, 
apparently at any time, rudimentary tails. These observations, together with 
those ot Meves and others, strongly confirm the position taken up by one ot 
us in 18Q5 (after the discovery of the rudimentary tail in the daughters of the 
heterotype in elasmobranchs), that from the first appearance of the chain of 
maiotic phenomena the cells in all the succeeding generations in animals tend 
to revert, sometimes actually, and probably always potentially, to the 
condition ot flagellate gametes. 
