Plate LII 



Fig. 34. Reconstruction of the ectal surface of the epithelium of the left buccal 

 sulcus of an embryo of 13.5 millimeters. Columbia Collection, No. 

 1S9, X 300, reduced i. Dorsal view. 



Fig. 35. Same embryo. Reconstruction f the ectal surfac of the oral epi- 

 thelium. Dorsal view, X 45, actual size. 



2. Angulus oris. 



4. Postangular bend. 



7. Orbital inclusion, pars lata. 



5. Orbital inclusion, pars cylindrica. 

 //. Dorsal separating sulcus. 



72. Parotid anlage. 



ij. Orbitoparotid interval. 



//. Orbitoparotid sprout. 



62. Ectopalatine sulcus. 



^g. Buccomasseteric nerve. 



84. First entodermal pouch. 



Sy. Hypophysis. 



