98 . THE ROYAL SOCIETY OF CANADA 



produced in situ by a differentiation of the zone of achromatic material 

 still forming the periphery of each group of muscle fibrils. 



23 Dr Gladstone and the writer have already pomted out that 

 the histogenesis of tissue is essentially a question of differenUaUon 

 of the general syncytial mass, which constitutes the embryo durmg the 

 early stages of development. i-rr ^„ 



24 From this standpoint the myo-syncytmm becomes differen- 

 tiated not only into the contractile and supporting elements of muscle 

 tissue, but also into the nerve elements, as Dr. Gladstone and the 

 writer hope to demonstrate in a future communication. 



25 The author was certainly unable to discover any evidence of 

 an ingrowth of mesenchyme tissue into developing striated muscle 

 or the purpose of giving rise to the sarcolemma. 



