THE MYCETOZOA. 



145 



ing of the spores and the further behaviour of the amoebae 

 have yet to be ascertained. Flesh, in which the parasites are 

 present in large numbers, presents a perfectly healthy 

 appearance; the muscular fibres seem only pressed together, 

 or pushed out of their position here and there by the parasitic 

 deposits. Nor is anything abnormal observed in the living 

 swine. The distribution of the, fungus, which is probably 

 taken up with the food, seems to be very wide ; Zopf found 

 that 25 72 per cent, of the swine examined were affected. 

 For further details as. to mycetozoa see Zopf and de Bary.* 



Fig. 26. Plasmiodophora brassicae. (Af ber Zopf.) 

 -1 . X 90. Transverse section throug'h a young root of a cabbage seed- 

 ling. In the epidermic cells (a) amoeboid or plasmodia-like condition 

 of the parasite. 



B, X 90. Section through the lamina of a cabbage leaf ; cells (a, b) 

 filled with the spores of the parasite. 



C, a spore which is just emitting its swarming spore X 600. 



/', swarming spores becoming transformed into amoebae X 600. 

 E, portion of the root of a young cauliflower which shows swelling? 

 caused by the parasite. Natural size. 



* Zopf, Die Pilzthiere oder Schleimpi/ze, Breslau, 1885. " Ueber 



Haplococcus reticulatus," Blolorj. C'entralblatt, 1884, No. 22. " Ueber 



Plasmiodophora": Woronin, Pringsheim's Jahrb., xi., p. 548. See also 



de Bary, Morph. u. Biologic der Pilze ; Mycetozoen u. Baklerien. -Leipzig 



1884. 



10 



