300 Charles R. Stockard 



Camera sketches of the living embryos in magnesium solutions 



Fig. 15 Dorsal view of twelve day cyclopean monster, the antero-median eye with furrow indicating 

 its double nature. 



Fig. 16 Ventral view of the same individual, the eye possesses a single pupil and lens. 



Fig. 17 A twelve day embryo, ventral view showing two eyes intimately approximated. 



Fig. 18 Fourteen day embryo. Small extremely anterior cyclopean eye with protruding lens, 

 extreme cyclopia. 



Fig. 19 A five day Monstrum monophthalmicum asymmetricum; the left eye has no mate. 



Fig. 20 A similar twelve day monster lacking its left eye. 



Fig. 21 An incomplete diprosopus monster seventy-two hours old. Two brains, two normal lateral 

 eyes and one perfect middle eye, the other middle eye indicated by the circular lens L. ^ 



Fig. 22 The same monster when eighteen days old, three perfect eyes. The embryo hatched three 

 hours after this drawing was made and swam abnormally. 



