. The cell; outlines of general anatomy and physiology. o ^3 a> O 262 THE CELL one makes its way in from the surface, whereas just the reverseoccurs in Echinoderm eggs ; further, both nuclei are approxi-mately of the same size, and lie close together, although for atime they do not coalesce, but pass through a period of , even after they have begun to prepare for the formationof the first division spindle, they do not commence to fuse. Inconsequence of this, and of the further circumstance, that inAscaris megalocephala during nuclear division there develop only afew nuclear segme


. The cell; outlines of general anatomy and physiology. o ^3 a> O 262 THE CELL one makes its way in from the surface, whereas just the reverseoccurs in Echinoderm eggs ; further, both nuclei are approxi-mately of the same size, and lie close together, although for atime they do not coalesce, but pass through a period of , even after they have begun to prepare for the formationof the first division spindle, they do not commence to fuse. Inconsequence of this, and of the further circumstance, that inAscaris megalocephala during nuclear division there develop only afew nuclear segments, which are of considerable size, and henceare easy to count, van Beneden (VI. 4a, 4b) was able to supple- L ii. in.


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