Metamorphosis of Axolotls 
43 
TABLE 3. 
Black axolotl. 
Day of obser¬ 
vation 
Fed on 
Weight 
Behaviour of the animal 
December 
19 
meat and thyroidine 
367 
g r - 
71 
21 
387 
„ 
28 
387 
* 
25 
* » r> 
„ 
26 
meat without thyroidine 
38-7 
» 
W 
28 
38 5 
n 
Gills somewhat shortened. 
V 
29 
39’5 
n 
* 
31 
38-4 
„ 
January 
2 
383 
n 
„ 
4 " 
meat and thyroidine 
. 
- 1 
6 
n 
n i* 
n 
7 
meat without thyroidine 
38 
* 
Gill-filaments considerably 
n 
9 
37 6 
* 
narrower. 
n 
10 
14 
368 
35*6 
V 
The resorption of gills 
slowly proceeds. The eyes 
)) 
n » w 
w 
begin to be prominent. 
w 
15 
n r> v 
35 T 
V 
The eyes are prominent ; 
n 
16 
n rt n 
34*9 
gill-trunks and filaments 
considerably shortened. 
n 
18 
n » » 
343 
* 
n 
19 
« n « 
339 
VI 
20 
« 51 51 
32 
* 
21 
" W w 
Sudden death caused by 
an accident. Almost com¬ 
plete metamorphosis. 
TABLE 4. 
Experi¬ 
ment 
Quantity of 
thyroidine given 
Loss of weight in °/ # 
Remarks 
No. 5 
2 37 gr. 
37 
scantily fed 
No. 6 
1-5 „ 
40 
„ 
No. 8 
0-5 „ 
20 
abundantly fed 
No. 15 
1-25 * 
29 
n 
No. 16 
1*5 „ 
22 
