Plate XII 



Fig. 5. Reconstruction of oral epithelium of a 20 millimeter embryo. Columbia 

 Collection, No. 325, X 60, reduced 5. Lateral vie.v. 



1. Buccal sulcus. 



2. Parotid anlage. 

 J. Orbital inclusion. 



Q. Subma.\illary anlage. 



14. .\lveolar sulcus. 



24. .^ngulus oris. 



2y. Nasal fossa. 



28. Superior dental anlage. 



j6. First entodermal pouch. 



J7. Hypophysis (stalk). 



