670 



THE SUBDIVISIONS OF TllK VKOKTAIILK KINUDOM, 



used for planting aro liablo to roproiliu'o tho disi'MHo noxt your. Soxual iH>pnnhio- 

 tion is as yot not oortainly known to oi-i-ur in tho liro-history of llio I'otiito-disouw 

 Fungus. Phj/toplitlioni omnirora and I'l/lhiuiu (/c Itart/aiiiiiu. attwk luid doNtmy 

 uiany young soinlling's, oaiising t.lunn to "dduip otV". \'nriou.s upooios of Pt^ro))Otfj)om 

 aro known which attack hvrgo nunihors of cultiviitod plants, J\ paraxilica woriis 

 havoc amongst tho Oruoi^o^^^; P, viticola (= I'lasiiiopara vitirola, lig. ;!S1) htw 

 boon roforroil to as a doadly disoaso on tlio Vino; /'. I'/i'/cr on various loginniiious 



Vi^. JlHl.-— 'riu* KiiIho Viiin inlltttnv. I'priiiinHlionl l^ilioohl. 



' A hiiiuih of (jrapoB kUiii'IiimI liy tlio I'lilao VluiMiilliluw. » Hpoi'oa or nnnlillji im liiniu'lind hviilim iii'dJiwMiitf (nun ii itomu of 

 n Vtni' hmr. Foi'UllruUiiii. < A hIiikIo I'liiililliiiii. > ."fwiinii Kiiiirua iirlaliiK wIMiln tliii miiildliim. ' A alnulo nwiirin aiiiuu 

 ' imt. elKO ; « x SO ; » » x iidil ; " x asil. (» " Mer Do llur.v. ) 



crops; P, llyoHCjiami on 'robacco-plautH, hosidos winch thoro M,ro niiiny otli(<rH. Tho 

 otlbcts ol' (fi/.ttopiiH c,iv)»(liditH havo nJroady Ikhui niuntionod (\i. 525); it iH coiiniioii 

 U[)oii cruoitorous ])ia,MtH. 



Al)Out 100 Hi)ocioH ol' l'oroiioH])oroio havo boon diHtingiiisliod. 



Saproliyii/utct'a'. -Ai-o all luiuatic. and I'or tlio most jiart Haiirophytin; a low iirn 

 parasitic on iish. In struoturo thoy much roHondjJo I'oi'onoHpoi'oio. Swmi'iii-hii()1'<ih 

 ii,r(! liboratod in larg() mniiboT'H IVoni tho (inlargod onds ol' Iho hyjiliio (llg. 'MO). 

 S(!xual organs ariso much as in INn-oiioHporoai, lait although tho anthnridiii dovc^lup 

 rcn-tiiizing tuhos in Hovoral instancoH, no caso has boon obsorvod in wliicli mi aciiial 

 transror ol' Biionnatoplasin occnrH. As a nilo sovoiui or tnaiiy (^gg-(M^llH aro produeud 



