METAMORPHOSIS OF THE AXOLOTL. 411 



Specimen No. 3. 



Placed in shallow water at a temperature of 55"-60°. 



Stage 1. August ITtli. — Length 124 inm. 



,, 2. September 25th. 



„ 3. October 10th. 



„ 4. November 12th, 



,, 5. November 20th. 



,, 6. November 27th. 



,, 7. December 5th. 



,, 8. December 11th. — Length 118 mm. 



Total length of period — 16 weeks. 



Specimen No. 4- 



Placed in shallow water at a temperature of 55°-60°. 



Stage 1. August 17th. — Length 105 mm. 

 ,, 2. September 25th. 

 „ 3. October 10th. 



Died January 22nd. — Length 105 mm. 



Specimen No. 5 . 



Placed in foul water frora which the oxygen was removed by 

 the gradual addition of boiled water. 



• Stage 1. August 17th. — Length 136 mm. 

 Died January 4th. — Length 155 mm. 



Speci7nen No. 6. 



Placed in shallow water at a temperature of 75°-80°, and 

 replaced in deep water as each successive stage was reached. 



Stage 1. October 7th. — Length 134 mm. 

 „ 2. October 20th. 



Replaced in deep water. 

 „ 1. October 28th. 



Replaced in shalloio tvater. 



„ 2. November 15th. 

 ,, 3. December 5th. 



Eejylaced in deep water. 

 „ 2. December 20th. 



Replaced in shalloto loater. 



,, 3. January 10th. 

 „ 4. February 12th. 



