242 DEVELOPMENT OF SALIVARY GLANDS IN THE DOMESTIC CAT 



cheek, until near the angulus its share exceeds that of the floor. Our 

 concern is with the caudal and intermediate regions, and here the 

 cause of the greater contribution of the floor is apparent in the greater 

 distance between the buccal sulcus and the inferior alveobuccal sulcus 

 as compared with the superior. This is but an e.Kpression of the 



Fig. 1 10. Frontal section through the orbiloparotid in- 

 clusion (i8) in its region of greatest diameter 

 in the 51 millimeter embryo. Columbia Col- 

 lection, No. 104, X IIS, reduced to ^. 



I. Buccal sulcus. 



13. Parotid duct. 



iH. Orbitoparotid inclusion. 



20. Duct of lirst orbital gland. 



24. Inferior alveobuccal glands. 



25. Superior alveobuccal sulcus. 



26. Inferior alveobuccal sulcus. 

 54. Inferior maxilla. 



S8. Zygoma. 



64. Superior dental anlage. 



65. Inferior dental anlage. 

 pj. Facial nerve. 



94. Facial vein. 



greater general expansion of the floor as contrasted with the roof of 

 the marginal ca\ity. as is shown also by the earlier disruption of its 

 epithehal thickening, and the earlier appearance of its dental anlage 



