THE ANATOMY OF THE ADULT HUMAN SALIVARY GLANDS 1 9 



in the lesser sublingual group of the adult human subject to divide 

 into more or less separate and distinct glandular masses. The clefts 

 separating these individual aggregations are irregular, at times coronal, 

 at times sagittal, or in many instances oblique. They seem to imply 

 a very primitive impulse toward the collection of the individual 

 glandular anlages into more definite aggregations, such as must have 

 preceded the more perfect development of the same principle in the 

 medial alveoUngual district which led to the establishment of the 

 separate major submaxillary and greater sublingual glands and ducts. 



DETAILED DESCRIPTION OF THE ADULT HUMAN GROUPS OF THE LESSER 

 SUBLINGUAL, ISTHMLiN, AND PALATINE GLANDS IN THE INDIVmUAL 

 INSTANCES HERE RECORDED AND FIGURED 



Figure 6 exposes the lateral aspect of the right lesser sublingual 

 mass 0) by fenestration of the body of the mandible in an adult 

 human subject, hardened by the intra-arterial injection of a 5 per 

 cent formahn solution. The aveolar border and greater portion of 

 the right mandibular body, together with the cephahc portion of the 

 ramus and overlying masseter muscle, has been removed. 



The lesser sublingual glands (j) form a dense mass extending caudal 

 to the Ungual nerve and thence turning, on the cephalomesal aspect 

 of the latter, dorsad into the faucial pillar, as the isthmian glandular 



group. 



The submaxillary duct, on the mesal aspect of the lesser sublingual 

 mass, is entirely hidden by the same. A small portion of the supra- 

 mylohyoid division of the submaxillary gland is visible beliind and 

 below the knee of the lingual nerve. 



The preparation also shows the relation of the facial vein (36) 

 and of the accompanying lymphnodes (37) to the ectal surface of the 

 inframylohyoid division of the submaxillary gland. 



In Fig. 8 the mass of the lesser subhngual glands (j), exposed by 

 resection of the left mandible, appears as a sharply circumscribed 

 triangular body, occupying the area between the plica sublingualis 

 and the lingual nerve. Narrowing at each extremity, with a wider 

 intervening body, the cephalic end of the mass covers laterally the 

 termination of the submaxillary duct (and of the greater subhngual 



