26o DEVELOPMENT OF SALIVARY GLANDS IN THE DOMESTIC CAT 



border of the masseter, where it terminates without enlargement. At 

 the border of the muscle it gives off laterad a large retort-shaped bud, 



which lies close to the muscle, 

 projecting horizontally at right 

 angles to the direction of the 

 cell cord from which it arises. 

 Here it would seem as though 

 the orbital path had been tried 

 and abandoned in favor of the 

 freer ectomasseteric course. 



This obitoparotid is the 

 largest in our series. In gen- 

 eral the length of the sprouts 

 is far less than this, varying 

 between 13 /x and 80 /^ as a 

 rule. The largest of those tak- 

 ing the ectal path along the 

 parotid occurs in embryo No. 

 21 of the Princeton Collection 

 (Fig. 97, //). Here on the 

 right side it extends to the 

 masseter, following its sloping 

 border almost to its ventral 

 limit. It lies directly in the 

 line of the border, deviating 



Graphic reconstruction of the neither mesad nor laterad. It 



orbitoparoiid element in the has a length in the sections of 



70 millimeter embryo. Co- jgo W. 



lumbia CoUection, No. 270. ^j^^ orbitoparotids in general 



72. Parotid duct. stain deeply and resemble the 



17. Orbitoparotid anlage. ^,^^^^ ^^Ug ^f ^^^ ^^^^ gp^^e- 



IQ. Epithelium of stomal ridge. ,. „ , r • . 



„: , . , J , hum. Some show a taint 



20. First orbital duct. 



73. Masseter muscle. PaHor of the center, wliich, it 



is to be presumed, is due to 

 the same prtjcess as elsewhere in the sahvary anlages. They are all 

 cylindrical in shape and rarely show even a slight degree of enlarge- 

 ment of the tip, from which it irlay be inferred that the process of 



