SALIVARY GLANDS OF LOWER PRIMATES 75 



the entire masseteric segment of the parotid duct is glandiferous 

 point to a still higher degree of development of accessory parotid 

 structure. 



3. ORBITAL GLANDS AND GLANDS DEVELOPED IN THE ORBITOPAROTID 



INTERVAL 



The observations of these structures are confined to the adult human 

 instances figured and described in Part I (cf. page lo, and Figs. 

 7, 9 and 12). 



They form a series of discrete small glandular masses, beginning 

 mesal to the termination of the parotid duct and extending thence 

 caudad between the eitlal aspect of the masseter muscle and the oral 

 mucosa, on whose surface they empty by separate orifices, occupying 

 the area of the carnivore stomal ridge described below by Schulte 

 (cf. Part V). 



II. Sub- and Intermandibular Groups 



I. SUBMAXILLARY GLAND AND DUCT (WHARTON'S DUCT) AND ASSOCIATED 



STRUCTURES 



(a) Main submaxillary gland. — The large gland situated meso- 

 caudal to the mandibular angle, whose duct reaches the floor of the 

 mouth by turning cephalad around the caudal margin of the mylo- 

 hyoid muscle. 



(b) Accessory submaxillary gland or glands. — The term is here ap- 

 plied to single or multiple smaller glands, distinct from the chief 

 submaxillary gland, developed along the course of \Vharton's duct and 

 emptying into the same by small separate canals. 



These elements may be situated above or below the main submaxil- 

 lary duct and are hence capable of being further distinguished as either 

 dorsal or ventral accessory submaxillary glands. The so-called "supra- 

 mylohyoid portion" of the adidt human submaxillary complex be- 

 longs to this group. 



(c) Secondary submaxillary gland. — This element is tentatively 

 distinguished from the remaining submaxillary components as a gland 

 located in the interval between the lingual nerve and the supra-mylo- 

 hyoid accessory submaxillary elements, and possessing a separate duct 



