CREATION BY EVOLUTION 



A, Original parent from which B, C, D, E, F are derived. 



B, Individuals small, with small spines. 



C, Bodies somewhat smaller, with larger spines. 



D, Spines still larger; bodies about the same size as C. 



E, Animals larger than A, B, or C and spines larger than in C. 



F, Bodies larger than others, but spines small. 



Fig. 3. — Five different races of Difjiugia corona derived 



from a single stock. 



[30] 



