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CREATION BY EVOLUTION
_p030_A_Difflugia_corona.png)
A, Original parent from which B, C, D, E, F are derived.
_p030_B_Difflugia_corona.png)
B, Individuals small, with small spines.
_p030_C_Difflugia_corona.png)
C, Bodies somewhat smaller, with larger spines.
_p030_D_Difflugia_corona.png)
D, Spines still larger; bodies about the same size as C.
_p030_E_Difflugia_corona.png)
E, Animals larger than A, B, or C and spines larger than in C.
_p030_F_Difflugia_corona.png)
F, Bodies larger than others, but spines small.
Fig. 3.—Five different races of Difflugia corona derived from a single stock.
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