EFFECTS PRODUCED BY CUTTIX<. PAKAMKCIl M < ELLS. 65 



division and the power of regeneration arc entirely independent 

 phenomena and are alike independent of the nucleus-protoplasm 

 relation BO far as mass is concerned. The failure of a small 

 fragment to divide completely might be due to the fact that the 

 divi-ion energy i- not great enough to overcome the -ur: 

 ten-ion of the body \\.dl-. Hut t hi- interpretation would hardly 

 account for the incomplete divi-ion of the cell in which only 

 a -mall portion of the terminal protoplasm is removed experi- 

 ment 7. Table IV.. p. 5J 



^l MMAHN. . 



1. I'nriinn i ;n: miulatnm ma\ be ea-ily rut \\ith a -calpel. 

 one. tin- larger, part, continue- to li\-e in about ^^ per cent, of 



and both part- ne\ er lor more than 24 hour-. If the 

 inn Icn- is injured by the knife neither part live- for more than 

 a te\\ hour-. The piv-ein paper i- a -ummar\ of about 15-' 

 rec< -idi d experimei 



2. ( ell- cut at either cxtiemitv are ju-t a- much deinorali/cd 

 a- iho-e cm in apparent!) mme vital part-. 



3. MM po\\er i.t rej 'i"ii \arie- in diftefeiit races "I 



"giant" P In die race "iil> about i per cent. 



^iieiaicd : in another bout lo |>er cent., in a third i 



about v ]! cent, n venerated, and in a tourth race all, or loo 

 IHI cent, n generated. Thi- la-t I.MC i- not included in the 

 ple-elit paper. 



4. There i- Strong t \ idem t "I a di\ i-ion /OIH- in l\irnmci nnn 



which lies in the center of tin- i ell. It tin- cell i- cm anterior 



or po-trii.-i- in tin- /<nu' the fragment di\i(K-- in the original 

 ]i!ane into a truncated abnormal !<>rm and a normal form. The 

 truncated form ma\ divide a^ain not through it- center, but 

 through the center ot ilu- cell \\en- it perlect. 



5. A Iragment. \\hethei anterior or |.o-t r rinr. die- \\ilhout 

 di\i-ion in tin- majorit\ of . in cases "I li--in. it di\id-- 

 a-\ mnu'IiicalK a- -tated above. Tlu* di\ i-ion. ho\\ e\ er. i- re- 

 tarded. In a feu cases the di\ i-ion i- abt>rii\e and a nioii-ter 



results. 

 o. After such a division into an abnormal and a normal cell. 



the normal cell continue- to divide normallv and form- a race of 



