Plate LXIX 



Figs. 100-103. Camera lucida drawings of frontal sections of the right side of 

 the same embryo as Figs. qS and oo. at the levels indicated in Fig. 99, 

 X 85, reduced to h. In Fig. 102 the lip of the cranial process is indi- 

 cated by a dotted circle ventrad of the buccal sulcus and mesad of the 

 deep facial vein (95). This position is frequent at this stage. As is 

 seen from Fig. 99, in this embryo the process in question was rudi- 

 mentary. To this extent the figure is schematic. In Fig. 103 the 

 outlines of a number of sections of the orbital inclusion have been 

 superimposed. The level of the basic section is shown in Fig. 99. 



Tuberosity of maxilla. 



Zygoma. 



Palate process. 



Ectopalatine sulcus. 



Superior dental anlage. 



Inferior dental anlage. 



Inferior dental nerve. 



Masseter muscle. 



Internal pterygoid muscle. 



Nasal fossa. 



Nasal septum. 



Lateral ethmoidal cartilage. 



Eye. 



Ophthalmic vein. 



Facial vein. 



Deep facial vein. 



