THE MUSCLES IO9 



(130) Tensor lympani, small fossa in petrous bone to malleus. 



(131) Stapedius, lateral surface of petrous bone to head of 

 stapes. 



(132) Orbicularis oris, concentric subcutaneous fibres around 

 the mouth. 



(133) Zygomaiicus minor (malaris) if present — ventral side of 

 eye to angle of mouth. 



(134) Quadratus lahii superior is, may be distinguished in 

 two parts: 



(134 a) Levator lahii superioris alaeque nasi, on side of nose, 

 and 



(134 b) Levator labii superioris proprius (or caput angulare) 

 or larger portion. Erects whiskers and . raises upper lip. 



(135) Caninus (levator anguli oris); retracts whiskers and 

 raises upper lip. 



(136) Buccinator, beneath caninus; raises upper lip. 



(137) Myrtiformis (nasalis of man in part); dilator of nares 

 and elevator of upper lip. 



(138) M oils tackier (incisivi of man) in upper lip; carries Hp 

 craniad. 



(139) Quadratus labii inferiores, in lower lip, not constant, 

 depresses lip. 



(140) Transversus menti, usually not present, from cranial 

 portion of alveolar border of mandible to join in midline with 

 corresponding fibres from opposite side. 



DEEP MUSCLES OF HEAD AND NECK 



(145) Sternomastoid (sternal portion of sternocleidomastoid 

 of man), cranial end of manubrium to lambdoidal ridge; turns 

 head and depresses snout. 



(146) Sternohyoid, first costal cartilage to body of hyoid; 

 draws hyoid backward. 



(147) Sternothyrcoid, first costal cartilage to thyreoid car- 

 tilage; draws larynx backward. 



