704 A. “f. Goldfarb 
TABLE 4 (continued) 
NERVE CORD | | BRAIN AND 
| 
Bee etl) SREGMENEE ST Co 3 con We ciaa pate | BRAIN” | aeteuRe| TIME 
REMOVED | ROM | REGENERATED) REGENERATED) CONNECTED 
| a | 
segments | days 
1.61 5 3 2 yes | yES 43 
1.65 5 | 3 ° no | no 55 
1.66 See 0 REP se 
1.68 5 2 4 | 43 
35 3 | 4 ° | no no 7 
5 79 3 7 ix ° | no | no 12 
1.89 3 3 0 BER alte Wee = 
mag ; 5 5 no no 20 
1.96 3 2 ? ie | a ar 
1.97: 3 4 2 BS 
1.98 3 4 2 m0 ao 2 
1.102 3 3 & z6 
1.103 3 2 | 2 AG 
1.106 3 | 24 | c | 2 
ss | | | 
| | 
missures, but the latter have grown farther ventrally, where they 
meet to form the first subcesophageal ganglion. 
No. 1.15. Amputated 3 segments. Removed cord from 9 
segments. ‘Time, 36 days. This animal is interesting not only 
because a new functional head has developed without any con- 
nection with the nerve cord, but because the distance between the 
cord and the new head is over 8 segments, a distance far too great for 
any nerve impulse from the cord to reach the amputated end. ‘The 
“brain” is connected by commissures which, however, end about 
one-half way towards the ventral side. Segments 4 to 114 inclu- 
sive have no trace of the cord. At the posterior end of the 12th 
segment, the early stages in the regeneration of the cord are ob- 
served, which in the 13th segment are replaced by a typical cord. 
Head Regenerated—New Brain and Cord Continuous 
The results may be arranged into two groups, in the early stages 
at least, according as the cord has grown more rapidly towards the 
head, or regeneration from the ectoderm has been more rapid in 
