606 
Sergius Morgults 
TABLE IV 
August 10 to August 
14 
ep Average 
| | ee a | 
No. of old segments............. | 30 | 28 | 31 | 30 | 32 | 33 | 30 | 30 | 33 | 27 | 25 | 30] 30 
No. of new segments............ | 2{ 2] 2 | Z| 2) wees | 2 eae || 3 23 
! 
After 8 days from 3 to 5 segments have regenerated, and from 
4 to 7 segments after 
12 days, etc. 
The records are presented 
mm lable V. ‘ 
TABLE V 
AVERAGE 
AVERAGE 
LENGTH 
No. OF 
DATE OF EXAMINATION | NO. OF REGENERATED SEGMENTS ars OF RE- 
GEN 
MENTS 
TAILS 
| 3 
oS oa | Pla eer rl | mm. 
JNU, Thisendanagoseanooge 131 S| 44) 4 5 a Seagal eas 4-4 0.32 
irae Sere swe seu eee a | 4 15 | 5°) fe) GG er ee a) oa 55 0.44 
26...eeeeeeeeereeel 4) 4/4/5555 6 | 6) 6177 778i) oa 620 0.56 
BO sa eisvetsis alesslols tkessse }4)4) 4] 5) 5 | 5 | 6 | 6 OPN GAGA UA CntG At oi 0.60 
Se PUsm Sebi cieysieterstsse leis fevers ANP TA Ng | 7 Nai tae Ls 8 10 6 .8* 0.76 
A stars avsisiat alee ’s = s(0i00% Wa S| SAF [Pega aga B ahem 6 .8* 0.88 
UE eee ata oe] Salah ge eyes ees| al | 
| i } \ \ 
* This high average was caused by the fact that most of the worms with a small number of regen- 
erated segments have died. With the aid of individual records of the worms it was possible to ascer- 
tain definitely that only four new segments were added since Aug. 30, so that the real average is but 
6. 4. In constructing the diagrams I used this average as the correct one. 
From this table it will be seen that what has been said with 
regard to the gradual diminution of increments of new segments 
after a period when these increments were quite considerable, 
in the case of worms from which two-thirds of the body had been 
removed, holds true also in this case. The accompanying dia- 
gram, Fig. 4, constructed on the same principle as the previous 
one, will illustrate the point. 
It is thus seen from the preceding tables and diagrams that the 
rate of forming new segments diminishes as the time after the 
operation increases. Unfortunately the worms of this experiment 
