ANATOMY OF THE SALIVARY GLANDS IN THE CARNIVORA 1 67 



then continued horizontally, nearly parallel to the mandible, to its 

 orifice close to the symphysis. Dorsally it is in relation with the body 

 and duct of the sublingualis major (24). Close to its termination the 

 duct of the sublingualis major deviates to its lateral side. Near the 

 arcus palatinus it is crossed by the Ungual nerve (29). In none of our 

 specimens were there any lobules whatever attached to the duct, after 

 its emergence from the liilus of the gland. 



The subungualis major (Fig. 4, 2j) regularly has an elongated body, 

 extending from the lingual nerve to the submaxillary gland. Two 

 portions may be distinguished, a caudal, of denser structure in which 

 the duct bifurcates, and a cranial extension in the form of small lobules 

 incrusting the duct. While no sharp demarcation can be made 

 between these portions by dissection, yet in general the body proper is 

 in relation to the digastric muscle, while the circumductular lobules 

 are supramylohyoid in position. Rarely, as in the individual of Fig. 4, 

 this latter portion is suppressed and the duct is entirely free of accessory 

 lobules. The sprouts of these incrusting lobules are formed at a late 

 period in development, and their anlages are still minute when the body 

 of the gland has attained a considerable size and contains branches 

 of the third and fourth order (Schulte). We may then recognize in 

 the sublingualis major, as in the submaxillary of many forms, a body 

 scnsu striclo and an efflorescence of incrusting lobules along the duct. 



The body is molded upon the digastric muscle ventrally (Fig. 4). 

 Laterally it is covered by the submaxillary gland, and the internal 

 pterygoid muscle ; mesally it rests against the styloglossus and 

 superior constrictor muscles. The duct surroimded by incrusting 

 lobules passes forward between the internal pterygoid and the muscles 

 of the tongue, here lying immediately ventral to the oral epithelium, 

 in contact with, and dorsal to, the submaxillary duct, and separated 

 from the mylohyoid muscle only by this duct and a small quantity of 

 connective tissue. I have not found these lobules extending farther 

 forward than the lingual nerve. At this point they come into relation 

 with the lesser sublinguals, which are mainly dorsal to them, though a 

 few of the more ventral members of the group are lateral to the sub- 

 maxillary duct. With the exception of the single individual referred to, 

 where the suppression of the collateral lobules was complete and bilat- 

 eral, I have not observed any considerable variation in the degree of 



