A STUDY OF METAMERISM. 447 



with a glass plate. Tiie pots stood in a large glass case iu oue 

 of the rooms of the laboratory. The temperature of the room 

 varied from about 70° F. during the daytime to about 50° F. 

 at night. Under the same conditions the normal worms kept 

 perfectly healthy. 



Table I. 

 Two segments cut off, 3/16, '94. 

 Killed, 4/28, '94. 

 2 segments regenerated 



vas def. 15 

 „ 15 

 „ 15 

 „ 15 



Two segments cut off, 3/4, '94. 



Killed, 4/28, '94. 



2 segments regenerated . . . vas def. 15 



Two segments cut off, 3/16, '94. 



Killed, 5/5, '94. 



2 segments regenerated. Sem. recept. 9, 10, 11 (normal) 



Table II. 



Three segments cut off, 3/4, '94. 



Killed, 4/28, '94. 



3 segments regenerated . . . vas def. 15 

 3 „ „ (and piece of 4) 



o ,, ,, . . . ,, 15 



o ,, ,, . . . ,, 15 



o ,, ,, . . . ,, 15 



3 ,, „ (and small piece of 4) 



2 „ „ (with indications of a third) „ 14 



9 



Three segments cut off, 3/16, '94. 

 Killed, 4/28, '94. 

 3 segments regenerated . . . vas def. 15 



3 „ „ . , . „ 15 



2 „ „ (sem. recept. 8, 9, 10) 



,3 „ „ (and little piece of 4) „ 15 



Three segments cut off, 3/16, '94. 

 Killed, 5/5, '94. 

 2 segments regenerated (sem. recept. 8, 9, 10) 

 2 „ „ ( „ „ ) vas def. 14 



