PLATE 4 



EXPLANATION OF FIGURES 



45 Lateral view of four euchromosomes and the accessory chromosome in 

 first spermatocyte metaphase. 



46 Polar view of first spermatocyte metaphase. 



47 to 58 Second spermatocyte metaphase complexes. 



47 Polar view with the accessory chromosome at the center of the group. 

 The series of sizes is well shown, but it is worthy of note that all the members are 

 only approximately two-thirds the size they were in the first spermatocyte. 



48 Lateral view showing superposition of the chromatids and their wide 

 divergence. 



49 and 50 Polar views. 



51 and 52 Lateral views. 



53 to 58 Polar views; in figures 47, 50, 53, and 58 twelve chromosomes appear, 

 in the others the accessory chromosome is lacking. 



736 



