Page:Popular Science Monthly Volume 84.djvu/532

528 in which the egg undergoes a part of its development within the body of the mother, as it is of oviparous forms in which the eggs are laid before development begins.

The fertilized egg of a star-fish, or frog, or man is not a different individual from the adults of these forms, rather it is a star-fish, a frog, or a human being in the one-celled stage, and thereafter this new being

 entrance cone (EC) and sperm nucleus (&#x2641;N) into the egg. Fig. 6 shows the first maformedmalformed [sic] by this division; Fig. 8, the second maturation spindle (2d Mat. Sp.) and the in the first cleavage spindle (1st CI. Sp.). (From F. R. Lillie.)