Plate LXXM 



Figs. 122-128. Sections of the alveolingual region of a 12 millimeter embryo. 

 Columbia Collection, No. 78. Fig. 122 is 100 /x craniad of the lingual 

 crossing; Figs. 123-128 are alternate sections. Thickness of sections 

 20 /u,, X 115, reduced h 



<?. Orbital inclusion, pars cylindrica. 



2Q. Lingual sulcus. 



JO. Submaxillary anlage. 



J.J. Anlage of greater sublingual gland. 



4J. Palatolingual plane. 



4S. Lingual nerve. 



4Q. Submaxillary ganglion. 



5 '. Meckel's cartilage. 



/(I. Inferior dental nerve. 



74. Internal pterygoid muscle. 



