68 MK. r. G. PABSONS ox THE 



whether the characteristic inflection of the angle of the marsupial 

 mandible may be due to the concentration of the pull of this 

 internal pterygoid on the lower margin of the jaw. 



The Digastric runs from the paroccipital process to the middle 

 third of the mandible ; it has the usual double nerve-supply and 

 its central tendon, although very short, is distinct. 



I noticed nothing special about the Buccinator. 



Styloid Muscles. 



No Stylo-hyoid was found. 



The Stylo-glossus is large and distinct. 



The Stylo-pJiarync/eus is also well marked, and has the glosso- 

 pharyngeal nerve winding round its posterior border as in Man 

 and other mammals. 



Other NecTc Muscles. 



The Sterno-mastoid is a single muscle on each side, rising from 

 the anterior (cephalic) border of the manubrium and being 

 inserted into the paramastoid process : the spinal accessory nerve 

 passes deep to it, and no representative of a cleido-mastoid was 

 seen. 



■ The Omo-hyoid is present ; there is no sign of a central tendon 

 or intersection. 



The Omo-tracJielian passes from the transverse process of the 

 atlas to the tip of the acromion under cover of the trapezius. 



Muscles joining the Shoulder to the Trunlc. 



Feetoralis. — This consists of three layers : a., the most super- 

 ficial, rises from the manubrium and is inserted into the lower 

 half of the humerus ; /3 rises from the whole length of the 

 sternum and is inserted into the middle third of the humerus ; 

 7, the deepest part, rises from the linea alba for a short distance 

 behind (caudal to) thexiphisternum, and passes deep to the other 

 parts to be inserted into the humerus just below the lesser 

 tuberosity, a and apparently a small part of /3 are supplied by 

 the external anterior thoracic, while y and the rest of /3 are 

 supplied by the great internal anterior thoracic, which also 

 supplies the greater part of the panniculus. 



The Cephalo-humeralis rises from the occipital curved line and 

 is inserted into the middle third of the humerus. If the cleido- 

 occipital part of the sterno-mastoid is present it is entirely 

 fused with this muscle. 



