RELATION OF lODIN TO THYROID 



405 



TABLE 4 

 Maij 6 



2. Experiments with feeding iodin crystals to normal larvae 



This experiment was conducted in the same manner as de- 

 scribed for the potassium iodide experiment. The larvc^e 

 averaged 10.5 mm. in length when the iodin was first fed, April 

 4th. None of the animals of either control or experimental 

 cultures showed any indications of limb development. Seven 

 daj's after the first feeding, the animals fed on the iodin had limb 

 buds "and showed other bodily changes not found in the controls 

 (table 6) . The larvae appeared emaciated ; head much elongated 

 (this change is only apparent and has been shown by the writer 

 to be due to atrophy of the coiled gut) ; body thin; eyes bulging; 

 pigmentation light. One or two of the animals showed signs of 

 tail involution. All of the larvae were extremely sluggish and 



