Plate LXXVII 



Figs. 129-138. Sections of the alveolingual region of a 13.5 millimeter embryo. 

 Columbia Collection, No. 223. Every third section. Thickness of 

 sections 13.3 ix, X 115, reduced to |. 



Figs. 129-132. 



2g. Lingual sulcus. 



30. Submaxillary anlage. 



3S. Tongue. 



42. Craniolingual plane. 



43. Palatolingual plane. 



44. ,\lveolingual region. 



45. Palatomandibular plane. 



46. Maxillomandibular plane. 

 4Q. Submaxillar\' ganglion. 

 ^o. Digastric muscle. 



5/. Mylohyoid muscle. 



52. Genioglossus muscle. 



§4. Inferior maxilla. 



56. Meckel's cartilage. 



60. Palate process. 



62. Ectopalatine sulcus. 



f>4. Superior dental anlage. 



rtj. Inferior dental anlage. 



68. Maxillary nerve. 



yo. Inferior dental nerve. 



