ENERATION <iF 1'oI.YCI.A I > TURBELLARIA. 



33, 



the manner de-eribed above: two week- later, after the wound 



had completely healed and the ganglionie region was tilled in with 



new ti--ue. the aiitt-ri>r end f the liead region A\a- removed by 



Li .1- indii ated in Fig. I. At the same time the anterior ends 



6 removed .it the -aim- level from am it her < >t~ indi\ idual- 



with uniniiin . lia. 



O 



O 



4 







The condition df the .mimal- \\ithou; lia .1 \\ k after the 



ud operation i- indieated in I ami ,>, \\hile I ig. .} -hi'U-> 



the i.-iidition . ,f the c.mtr'U. Tin- dilli-reiiee i- markel and 

 reqniit- iin (''inmetit. After two \M k- n .-ration i^ 



alimt or quite coini >lcit- in the eontroU. \\hile tlie animal- \\ith- 

 OUt i;.iiiv:lia remain e--eiiti.ill\ a . eiieration ne\ er 



jjrocee.U further in them. 



In the-e e\peiiment- ^ivat care was u-ed to lie certain that the 

 uan^lia were entirely relinked. In \ariou- -|it.-cie~, tin- ^an-lia 

 Can be seen quite dearlj from the \ ciitral -in face and examination 

 in. m thi- -id. alter the ojieration \\ill u-u.ill\ -how e\eii rather 

 Miiall p of the uan-lia if the\ n-inain. M-ir^an doe- not 



^tate ho\\ the total al>-cnce o| the ^aii^lia was determined in 

 her experiment- and it -eem- probable that in i ises u here tin- 

 anterior end of the head regenerated a- rapidl> and a- completeK" 

 in animal- -uppo-edl\ \\ithoiit i;an;;lia a- in 'Im-e \\ith uninjured 



