76 THE CELL DOCTRINE. 



Goodsir, to be the author of the " first consistent 

 accoun.t of the development of cells from a parent 

 centre." The idea of cell territories seems, however, 

 to have originated with Goodsir, nor do we believe, 

 for the reason stated, that Virchow intended to usurp 

 his prerogative. The merit of Virchow consists in 

 his application by actual demonstration of the first 

 of these points to so large a variety of physiological 

 and pathological processes, to which is added original 

 conception in the prominence given to the. connec- 

 tive tissue corpuscle and the canalicular system, 

 whatever may be the truth with regard to. either. 



SARCODE OF DUJARDIN — PROTOPLASM OF MAX SCHULTZE. 



1835-61.- 



Dujardin* had, in 1835, discovered in the lower 

 animals a living, moving, contractile substance, 

 which he called sarcode. The peculiar appearances of 

 this substance ..attracted the attention of many ob- 

 servers, among whom were Kiihne, Eeichert, Ecker, 

 Henle, Meyen, Huxley, Max Schultze, John Miiller, 

 and others. ■ It was thought peculiar to the lower 

 animals, and there was assigned to it a property of 

 "irritability without nerves."t ' 



The observation of Siebold,:]: that the yolk glob- 

 ules (vitelline spheres of the egg) of Planaria exhibit 

 contractions and expansions, which with suitable 

 care continue for hou rs, and the discoveries which fol- 



* Dujanlin, Ann. d. Sciences Nat., torn, iii et v. 

 f Schultze, Max, Organis. d. Polythalamien, 1854. 

 X Siebold, Froriep'a Notizen, Nr. 880, p. 85. 



