Plate LX 



Figs. 58-61. Right parotid anlage of a 13.5 millimeter embr\'o. Columbia Col- 

 lection, No. 223. Series of alternate sections, X 115, reduced to 5. 



12. Parotid anlage. 



I ,\ Subparotid condensation of mesenchyme. 



26. Inferior alveobuccal sulcus. 



2g. Lingual sulcus. 



38. Tongue. 



43. Palatolingual plane. 



44. .\lveolingual region. 



45. Palatoma.xillary plane. 



46. Mandibulomaxillary plane. 

 54- Inferior maxilla. 



5(5. Meckel's cartilage. 



60. Palate process. 



62. Ectopalatine sulcus. 



64. Superior dental anlage. 



65. Inferior dental anlage. 

 yo. Inferior dental nerve. 



7 ?. Masseter muscle and zygoma. 



g4. Facial vein. 



