A NEW SPEC IKS OF I 'A KAM KCIL'M. 



our demonstration of the actual nuclear exchange during c.m- 

 n. Ian -uch exchano- i- naturally \ In- inferred from the 

 ry divi-ion () f the micronuclei ami from -ul>-e<iuein 

 loun of ill.- niai roniit leu-. K\ery feature of the fc\v 

 .amined indicated normal pi - ami con- 



dition 



Although tin- i ultiire- -tarted t'mni th, , \ , onjugants I'an-d SO 

 il\ it : h noting th.it -hTtl\- .ilt.-r tlu- lattrr \\.icdi 



d in Culture Y this culture nnd.-r\u-iu a rapid at i ( Icrati.'ii 

 i..\\ ih .nid di\ i-i-.i! I is n . lia\- 1-ri-n dm- to limit 



urrini; in the cull u: M i In- < -t lu-r hand 



it ina\ ha-. ..I -tiniulu-. u liich it-i-lt" 



I r-iin thi- rapidk ^r<p\\in^ culture 



tin ih.-i -I- r i have been mounted, and, as bel 



all |M"\r 1. 1 l.- .t" tin- multimacronucli - dona 1 



also been und. and d uith iron h.i-inaln\\lin I "in 



dittrn-nl i;r.iup- imiiintrd during lli. llu-N ha\e I'ully 



IH.MI,- ..til lln- it -uli- ! l In- in. m- IIUIIHT..U- ti-l nitnint-. 



All t.ild the i lllllll.-- lia\e ! 'iitlllt ted. tin- ti: up tfl 



ihiff. and lli* ni.iiith-. llif\ ha\r imt ln-m as 



str "U It I In- \\ i-ln d. I UK tin- In -i i ulturr- t'l.tainrd -h<>\\rd 



at lra-t n tO 'lit- "ill ami a( thr cl-.-r "t the U"ik 



ciilinit- Y \\a> multiplying im>rr r.i|iidl> than at an\ |ut\i"ii- 

 liin. II nl "in trinpi-iaiuri- d -mlit i< m> ln-i-n imuv unilHrin ami 

 !a\"ial.lr, \\t- -hoiild pM.|iaM\ ha\- lu-di al.l. !i imirc- 



t "pi. ni- nh in. 3. Iht- t-ni in- nnil"iiiiit\ nl" tin- t Y|'r I hn m;< limit 



thr-i- culture- -eelll i e\it|t : il- peniiailelHe ami the 



ppilialiility lhat it deserv< ilic rank. 



LUD1 \\'M. Mi n in i i.. 



I tan I ill I \ \ i >uch I't-r the meth"d- ami resultswhich ni\ -tin lei it , 

 Mr. Mitchell, h rdel in ihe lir>t part "I" thi- pap. r. I 



ina\ -|'e.ik a tfu \\"i.l- lunlu-r a- in nu >\\ n experience \\ith 

 /'. muUimicronucleata. It i> not, in the \\riter'- \icinit\-. a rare 



or attidental t\|>e. Tin Mi^hoiit a lUlinlit-r ol years of \\ork in 

 eastern .V-lira-ka it ha- lu-en a frc-<|iienl and t roulile-oiiie in- 

 truder in mv I\ir<iii'(inni culture-. The ;u.-t ]>er-i-teiit elT"rl> 



