SCHULTZE REICHERT HACKEL. 99 



must once more expressly point out that Keichert's fears that 

 the bases (Grundvesten) of the cell theory are shaken by my 

 view of the cell are completely groundless. Nobody can be 

 more deeply penetrated with the conviction than I that the 

 doctrine of the cell, as the fundamental element of all animal 

 tissues, is for all time inalienably assured. Far from wishing 

 to put anything new in the place of the cell theory, I seek 

 rather by my view of the body of the Khizopod to bring its 

 substance the so-called Sarcode, hitherto standing outside the 

 cell theory under this theory. And, as regards my position 

 towards Schwann's doctrine, I think that in many points we 

 shall have to return to the purer form of the same. My obser- 

 vations force me ever more to the conviction that ' the corre- 

 spondence in the structure and growth of animals and plants,' 

 as Schwann entitles the scope of his celebrated researches, is 

 much greater than people are nowadays inclined to believe " 

 (p. 63). I cannot but think that the protoplasmic theory of 

 Beale is a more simple and natural fulfilment of Schwann's 

 object than Max Schultze's attempt to uphold the cell theory 

 in words, while explaining it away to nothing in fact. And it 

 is difficult to see what hinders him from following Beale en- 

 tirely. But that he does not do so, and that he rejects the dis- 

 tinct declaration that all structure is dead, while the structure- 

 less protoplasm alone is alive, is plain from the above quota- 

 tions. After this there can be no question of priority, for no 

 one, then, was so near Beale as this author. 



Keichert still after this continued to uphold the 

 typical cell, and contested the fact of the internal 

 movements of the sarcode of the Rhizopods ; but his 

 arguments are not deserving of any attention now, 

 although Hackel, in his memoir on the Monera, 1869, 

 took the trouble to refute them. Hackel claims for 

 himself the merit of having done much to establish 

 the protoplasm theory, in his " Monographie der 



72 



