PLATI CX1V. 



FIG. 310.- After llcrnard. Anatomy of the parts exposed in operations on tlie submaxillary gland. The pos- 

 Ifl DitlBOle has been rcmoxed. M. Anterior lialf of the muscle drawn aside by a hook. 



M. Insr, : ior half, which lias been removed in order to expose the carotid artery. 1 1' Sympathetic 



filaments, a. Sul.n.iixillary gland drawn aside l.y a hook in order to show its deep BUrface. II. Submaxillary 

 and sublingual ducts. .1. Trunk of the external jugular vein. '' Branch of the jugular vein passini; lieliind the 

 .!and. .1 . r.i-anch ot tin- jugular vein passing in front of tlie gland, cut across. ]). A vein issuing from the sub- 

 in,-i\illary -land, t f. ( 'nroti.1 artery accompanied l.y a sympathetic filament on either side ; only one filament, t, 

 's distinctly .-ln.wn in ' > Origin of the inferior artery of the gland. 1>. Hypoglossal nerve. 



1.. Lingual ncv\c. T. clionl.a tympaiii going to the sul. maxillary gland. S s'. Mylo-hyoiil nniscle, cut 



i,l the laavary ducts which lie K'lieath it. U. Masseter muscle covering the angle of the 

 kWr jaw. /. Origin ..t the mylo-hyoid nerve, which is hidden by the reflected digastric and mylo-hyoid muscles. 



Fir;, -in. --lia.-tric cannula seen in section, and key. A, outer flange; I!, inner Mange; r, ],]-..iect ing points 

 hy \\hici. tlic outer can tie screwed round on the inner tuhe, so a.s to increase tlie di>tance between the flangea. 

 D. ]), is the key l.y which the tube is turned. It consists of a circle of metal, with two slits, ].) and 1), into 

 which the project ions c pas.,. U is attached by a cross-bar to a handle K. which is ftboUl six . elghl inches Ion-, 

 though cut short in the eii-i.iv in-. 



FIQ.3I2. 





