Plate LVIII 



Fig. 46. Frontal section of the right parotid fold in a 12 millimeter embryo. 



Columbia Collection, No. 100, X 400, reduced to f . 

 Fig. 47. Frontal section of the right parotid fold in a 12 millimeter embryo. 



Columbia Collection, No. 217, X 400, reduced to 4. 

 Fig. 48. Frontal section of the right parotid fold in a 12 millimeter embryo. 



Columbia Collection, No. 263, X 400, reduced to f. 



