Plate LXX\' 



Figs. 118-121. Sections of the alveolingual region of an 11 millimeter embr>'o. 

 Columbia Collection, No. 213. Every third section. Thickness of 

 sections 13.3 /i. X 115, reduced to i. 



2Q. Lingual sulcus. 



JO. Submaxillary anlage. 



40. Lateral tongue swelling. 



41. Tuberculum impar. 

 4j. Palatolingual plane. 



44. Alveolingual region. 



45. Palalomandibular plane. 



46. Maxillomandibular plane. 



47. Hypoglossal nerve. 



48. Lingual nerve. 



4y. Submaxillary ganglion. 



55. Meckel's cartilage. 



65. Inferior dental anlage. 



70. Inferior dental nerve. 



