N 
WEBER 
138 
EDEL BB 
Half of normal cleavage . . 1-2; 
Transitional form... ... 1—2; 
Half of double cleavage . . 1—3; 
Many other transitional forms exist, and it is worthy of note 
that the two halves are not always alike. Thus, I have a preparation 
of the double 16-celled stage in which one half shows the typical 
double cleavage (like that of an isolated 4 blastomere) while the 
other half is of the mixed type, agreeing exactly with one half of 
fig. 2, E. 
5—6; 7—8. 
7-5; 8—6. 
7—5; 8—6 
