THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[THIRD SERIES.] 

 No. 60. DECEMBER 1862. 



XLII. — On the Phenomena of Motion in the Pseudopodia of the 

 Rhizopoda, and especially on the so-called Granular Movement 

 and the supposed Coalescence of the Pseudopodia. By Prof. 

 Reichert*. 



[In the introductory portion of this paper, Prof. Reichert 

 endeavours to controvert what he calls the " sarcode-theory/' 

 under which he sees a revival of the old notion of a living 

 primordial slime capable of being produced in some mysterious 

 manner independently of preexisting organisms. As we cannot 

 see that the idea of the nature of " sarcode" generally entertained 

 involves any such opinions as to its origin, this part of the au- 

 thor^s paper has been omitted, and the translation commences 

 with his discussion of the motile phenomena presented by the 

 pseudopodia.] 



Whilst Ehrenberg, in his investigations of living Polythalamia 

 from the North Sea, declares himself expressly against the 

 coalescence of the filaments emitted by themf, Schultze, in his 

 work ^Ueber den Organismus der Polythalamien^ (Leipzig, 1854), 

 places himself entirely on Dujardin's side; and to this view the 

 cell-membrane could not but fall a sacrifice afterwards. Accord- 

 ing to him, the body of the Polythalamia consists of a formless 

 substance, comparable, as to its consistence, with fluid wax, 

 containing globules imbedded in it here and there. The phe- 

 nomena of motion in the pseudopodia are described by this au- 

 thor essentially in accordance with Dujardin, but rather more 

 accurately, both with regard to their branching and coalescence 

 and in respect of the so-called granular movement in and upon 

 them. Of the granular movement Schultze speaks as follows : — 



* Monatsbericht der Akaderaie der Wissenschaften zu Berlin,1862, p.406. 

 Translated by W. S. Dallas, F.L.S. 



t Abhandl. der Akad. der Wiss. zu Berlin, 1839, p. 106. 



Ann. ^ Mag, N, Hist. Ser. 3. Vol x. 27 



