PLASMODIOPHORA. 



Tin- above-named investigator- found pla-modia in variou- sta 

 of development in the pali-ade cells, and later in the -pon-\ 

 parenchyma of diseased lert\ - -. < )n t 1 -i-atmeiit with "can d- 

 javelle " the plasmodia remained visible, \\hei.-a- th.- contcnt- 

 of healthy cells disappeared. Spore-formation has not 

 been observed. The same parasite has been seeD in vine- in 

 the IMiine district. 



lleeently I>ebrav and l>rive' have, in e,,nM-i|iiriice of their 

 researches on I'runissure, removed the fun -us fiom the _--nu> 

 Plasmodiophora, and founded for it a ne\\- .^i-oup Pseudocommis, 

 with a position near Vnmj>i/i-i//i> and .]///"////// ( *. This same 

 fungus they al-o found in a larje uumlier of plant- fn>m thirty 

 different natural order-. 



Plasmodiophora californica \'iala et Saiiv.- is another vine 

 larasite which causes greater damage than the preeedin- -|- 

 Ueddish leaf-spots are produerd, and extend so j-apidly that tip- 

 leaves may drop early in spring. The parasite also alleets the 

 shoots to such a degree that an abnormal number uf shortened 

 branches are developed, the wood of \vhieh exhibits bro\\ n 

 stripes in autumn. 



It has not as yet been quite proved that the plasma observed 

 in withered vine leaves really consists of pla-modia of the 

 a bo vi.' two species of /V^*///^//'iy*//o/v/, nor have spi.rrs been 

 found. The true cause of the diseases ha> probably -till { be 

 explained. 



In eases i.f rout -detormat ion in pear, Muller-Thurjan 

 a -lime-fuimir- in cells of the root-parenehyma. 



Tetramyxa. 

 Sp,,re> uniteil four together as tetrads and eiie!"-.-.) in a 



delieate I lie] 1 1 1 irallC. 



Tetramyxa parasitica Goeb. 4 Fir-i louml by Co.-bel in 



s () f mar-h\ np-ado\vs, eaiisin- tuberous ball- of a \\hiti-h- 

 D to broun eoloui- on leaves, llo\\rr<, and stalk- ol /.' 

 ,;,*t,ll,tt<i. SeCtiODS of the swellin-- .-ho\\.-d the paieip-hyma 

 to be divi.-ible into a ilaik bi'ou n central pail CODSJ tin 



' //(/.'. /';////.,! \\., IV.I.'i; ;inil " Ltt /' '' ! 



npt. i- ml., > \\ . is'.i'j. |i. t;:. 



.///,/,-',,,;,/(/ ,/. I',/,. .S'/n/. II', / . II. 



. li.-l. Flora, \^*\. Identified in Scotland b; \r.i\\ 



J i. 



