Fig. 1 Normal embryo of Fundulus heteroclitus, nine days old. h., heart. 



Fig. 2 Synophthalmia bilentica, from y.j gram moler-uhxr butryric acid, 

 twenty-eight days old. pc, pericardial vesicle. 



Fig. 3 Snyophthalmia bilentica, from ylj gram molecular butyric acid solu- 

 tion, twenty-eight days old. 



Fig. 4 Synophthalmia unilentica, from y., gram molcc. butyric acid, twent}'- 

 four days old. 



Fig. 5 Cyclopia synophthalmica, from acetone solution (35 cc. to oO cc. sea- 

 water) twenty-six days old. 



Fig. 6 Cyclopia perfecta, from y-j gram molec. butyric acid, twenty-four days 

 old. I., lens; p., pigment epithelimn; h., heart. 



Fig. 7 Cyclopia perfecta, from acetone solution (35 cc. gram molec. to 50 cc. 

 sea-water) twenty-five days old. 



Fig. 8 Cyclopia perfecta, from yj^- gram molec. butyric acid, thirteen days 

 old. e.v., ear vesicles. 



Fig. 9 Cyclopia perfecta, from yV gram molec. butyric acid, twenty-eight 

 days old. 



488 



