EXPLANATION OF PLATES 



PLATE 1 



Fig. 1. A section of the testes of a June deer, x no. 



Fig. 2. A section of the epididymis of the same deer, showing the absence of 

 sperm in the tubules, x i lo. 



Fig. 3. A section of the testes of an October deer, x 165. 



Fig. 4. A section of the epididymis of the same deer, showing abundant sperm 

 in the tubules, x no. 



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