A NT IES OF I'AKAMKCIt'M. 



- upon nuclear difference- only. Tin- external character- 

 mentioned l.s Mr. Mitchell, although holding good for the- ma- 

 terial in\. iiim and for many other lot- a- \\ell, are 

 not univer-al, ii.r have [l ted rnal character that i-. 

 When /'. multiti AH in the -a mo culturo \\ith 



i\\\ -:tni, the t\\o can u-nally l>e readily 



ed |.\ ..in- or i ;ial characui- 1 requeiitly the 



/'. m nltim: :e uniformK than the accompanying 



iiolntnn: hut die\ do n ;]]e kno\\n dirndl-ion- ..f 

 the commoner lorin. and. in -ome culture- the\ are uniformly 

 -mallei - \\ith length form of end-, opaquoi' 



The iin. -I unit". tin (ll.r 1 lia\e -eell i- tll.lt the 



neu I \ pe i~ a liirh n -m. luil^ini: le-- at tho 



point . iriit /' appioa; he- this 



I'M III ill -la! \ ed CllltllV 



I he pro; :|on IHK lear < harai ter- n\y 



depend upon their :i< y. ( "alkin- ha- -ho\\ n 



dial id \\ilh ind doul.le microiim lei 



i\el\ an- not \\ hi||\ i <.n-i -ion.il iran-ili-'n- taking 



pla< e in l.oth dii- II.. then ; -rom .1111. ed die t \ pe- 



\ aiieiii But the conclusion h tiled in question, 



the illtlei|llel ill-ilio|| leadilU Iv'l.'id to re-illlel pl'el 



die phen. uneiia a- in-lain e- o| nnitalion. 



I ha\ e m\ -tit 'ii-iiletaMe part of 



the pie-, in year, pieliminai\ experiment- on /'. mmlntnii:, -nl- 

 ieciin- them to dill.t, nt (.-ndiiioii- uilh a \ie\\ to a-certainin^ 

 iheir |>o--il)ilitir- <.| \arialioii. The oiil\ -irik lilt- ha\e 



Occurred as the c,.n-e(|Ueiiee- ol in leedinii 



habit. 



/'. i.utdntitni i- alm-t e\clu-i\el\ a kicteria U-t-der. Hut a- 

 Mr Mill hell ha- re. orded tli<-\ occ.i-ionalK de\iale l" '-llier 

 minute \e^elal>le Organisms. Thi- Near I ha\e -ucceeded ill 

 inducing a cerlain percentage of the individual- irom a pun- 

 culture of \ ei\ lat^e and -trolly -ro\\in- /'. mndatnm to h-,(| on 

 minor animal or-aiii-in-. lir-i on Magellan- ( 'hilonwini?- and 

 then, lo a con-ider.ible extent. ii])oii -mailer ciliate-. Th--e \ et \ 

 :-trikinu i han-e- in fo,.d habit produced \ er\ -irikinj; \ariatioiis 

 in die Parameria. 1-oth nuclear and c\'to|ila-mic. I will not 



