ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 309 



as MucosplmreUa hthauIZT f^fn "■ '^""S"'' ""1^"^'' ■« described 

 -S^A^r.?// ?/«/A«;Y,Vm« also a'mrnfL nt ?/,",?'™"' particular fro.n 

 These different spedes of aTo^Z? ^^''''"'-I' "^ ^^^P*^^" ^P^«^s- 

 host plants, and a?e thlt Irttr^ «-^'« d-^=- to the 



byS^nfaK'^n^^tTnt'oTrTr'^^" *'"^ -^"^ ^o- 

 to the extreme difflcultv of dec difo the affiZvi f ^' '''■""! ^'^''""°" 

 experiments he made with a snSs that fr n , ^'P'"'"'' ^"^ '5«^«f'«s 

 in the cultnre-plate. He found tSl^tht I '^ ^''P •^""'^^ P''g'°«"t 



the addition of acids or alLHr»n^ if '^^'oi'i'^as strongly affected by 



reagents as an aM to detrmiLalion ''"''^'^'^^' *« -^^^od of chemici 



mod?ofdevetoS'nUrafe~'*!.°'''r'°? '^- ''''"■^'"7 describe the 

 narrows at theTpex to fo™ a?n, f , °''^'T^r: ^ '°-^-=<>«''l filament 

 at the side of the first-f ormed a eirn'f f'','' ^' '"'i,"^ ^^ « ^^P^-"". 

 duced, the apes of the nn, ;^,. f '?"''"' ''"""^i^ ="•« then pro- 



SIean;hile, Sa arfbe "ttTbXw\Te t't"^" "^'""Tr- 

 chains cover the head of the filanient TiT *''^'''«' f ™s, until long 



varieties, and give various biologlSldetaiK' '"*"" ^'"''''' ''' "«' 



spore fom. It was supposed thf/^hr;n°'l?r'''''' «"'^ 'he uredo- 

 would be binucleate, anTr J BoU^ L^f I? '^' "^^'fT' ^P°^««'etc.. 

 a view to settlino- this ooinr TJ^tA ^f f^^ined the species with 

 was constant il\ilthl It. l^T^t^^^ ^^^ binucleate condition 



Uredo. It is possible tLt^^f; F . ° ^^""^ **^ P^''^^^''' """S a true 

 possiwe tbat the teleutospores mav still be found 



the5ectt''ll:iyf;r:S-'~^ l"^"^ ""'' '-'^^ -^tndv of 

 to confirm Mairlt obMom ^1,^^ °° *7f ^■"•"'»- He was able 



ducedin thfeariv^nart^'of M" '^'^ ^"''7^^^'' '^^^ the spores are pro- 

 becomes°wSLraKal°v fc bT' '"' ''''' '''' "^^ ^"^^^^^ ?'-' 



are L'ch itgef ^Tn't'he nS ''1 1 '"^'''' ''"^ '^i^-^d ?•-'« 

 tended erowth to e^cn^rf, *? ' """^ ''"' P'''"'^ "'■« able by this ex- 



long stion may arise C°"b other"'"'."'' °' ,'!^^ ^""""^- ^ ^'"'u'r 

 lack of nourishiient = unfavourable conditions, such as 



Various deformations are occasioned in the leaf by the fungus ; it 



t ?r • ?°^- *ly"=°l- France, xiix. (19131 nn 107 L 

 i ?^"™'- C.^^t'^lW- ii. (1918) pp. 193-8 (ffli)"*^- 

 § CenTalbl. Bakt., x^li. (i^/gj pp. 395:io97l pi ) 

 t/une 18, 1913 v f • ;• 



