THE VESSELS. 301 



b. Art. submentalis passes directly forwards, along the (internal) inferior 

 border of the lower jaw, between mm. mylohoid. and digastricus, inclines on 

 the external border of the last (vent, anter.) upwards, supplies the skin and 

 muscles of the chin, and anastomoses with branches of A. dentalis inferior 

 and sublingualis. 



c. Kami glandular es, 3. and 4. small, supplies gl. submaxillar. 



d. Eamus pterygoideus, small, for m. pteryg. interims. 



Branches in the face. a. External, supplying the muscles and skin of the 

 cheek ; the most distinct are, ram. massetericus and buccinatorius. 

 b. Internal. 



1. Art. coronaria a. Idbiolis inferior, arises close under the angle of the 

 mouth, passes between the muscular and glandular layer, not far from 

 the free edge of the under lip, and anastomoses with that of the other side. 



2. Art. coronaria s. labialis superior, arises at the angle of the mouth, under 

 m. levator labii super., passes to the upper lip like 1., and gives off from 

 the middle line : 



a. Art. septi mobilis nasi, which passes to the cartilaginous nasal sep- 

 tum, vertically upwards, and then horizontally under the sept . mobile. 



b. Art. pinnalis s. alaris nasi, at the posterior border of the nasal open- 

 ings, anastomoses with : 



3. Art. angularis B. nasalis lateralis, passes upwards from the angle of the 

 nose to the internal angle of the eye, and there unites with art. ophthal- 

 mica in the art.frontalis. It gives the following branches : 



a. Eami pinnales, 1. at the superior, concave border of the nasal pinna ; 

 2. enters into the nose. 



b. Rami dorsales, on the back of the nose. 



c. Rami palpebrales, on the inferior eyelid. 



The most remarkable anastomoses of Art. maxillaris externa are : a. with 

 A. dental, inferior; b. with A. maxillar. intern.; c. with A. ophthalmica. 



545. The posterior branches of Carotis externa. 



4. Occipitalis, the occipital artery, smaller than 1. and 3. Origin: Art. 

 maxillar. extern, or lingualis, opposite, sometimes close under, the Parotis; 

 covered by m. digastricus and INT. hypoglossus. Course : oblique upwards 

 and backwards, above proc. transv. atlantis, under incisura mastoid. horizon- 

 tally backwards, very tortuous. Position : deep, separated in front by m. 

 stylohyoid. from art. auricular, post, and carot. externa. The horizontal por- 

 tion between m. rectus lateral, and complexus, then between obliquus super. 

 and splenius. Divided under m. splenius into an external and an internal as- 

 cending branch. 



Collateral branches : a. rami cervicales consist of: 1. for m. sterno-cleidom.; 

 enters at the internal surface into the superior part of the muscle, turns round 

 the loop of the n. hypoglossus. 2. Ram. descendens, between m. splenius and 

 complexus, divides among the superior layers of the cervical muscles (m. splen., 



