132 WILLIAM M. GOLDSMITH. 



vening fibrillar bridges, until the nuclear wall becomes visible 

 and presents a homogeneous appearance (Figs. 15, 16, etc.). 

 This membrane, though invisible prior to this time, remains 

 very conspicuous until the prophase of the first spermatocyte 

 division. These observations, while not conchisive, indicate that 

 the nuclear membrane may be, at least in part, chromatic. 



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