304 MYOLOGY OF CHLAMYDOSAURUS KINGII, 



The preceding three muscles are but moderately developed. 



Zygomaticus (fig. 2 — z.) — A thin but very distinct muscle rises 

 from the curved posterior edge of the malar, and rests upon the 

 anterior portion of the temporalis. It is inserted by two attach- 

 ments into the outer and inner sides of the commissure of the lips. 

 Its office being clearly to raise the commissure, I venture to 

 recognise it as a zygomaticus major, and very unexpected the 

 recognition is. 



Muscles of the neck and throat. 



Complexus major. — From the spines of the anterior two dorsal 

 and transverse processes of the posterior cervical vertebrae ; — 

 inserted as usual into the supraoccipital and parietal process. 



Complexus minor. — From the transverse processes of the cervical 

 vertebrae ; inserted by two equal divisions separable for some 

 distance from their points of attachment into the parotic ridge and 

 into the occipito-parotic process beneath the insertion of the 

 sternocleidomastoidens. 



Rectus capitis posticus major. — Under the circumstances I was 

 rather surprised that no trace of this muscle was discoverable. 



Spinalis colli. — Lying between the spines and transverse 

 processes of the cervical vertebrae beneath the complexus major ; 

 inserted beneath the complexi into the supraoccipital and parietal. 



Sterno(cleido)mastoideus (fig. 1 — s. c. m.). — A very narrow ribbon 

 running obliquely from the foremost point of the true sternum to 

 its insertion into the occipito-mastoid process. 



Omohyoid (fig. 1 — o. h.). — A powerful muscle rising from the 

 middle third of the anterior edge of the clavicle; also by a narrow 

 slip from the sternum below (ventrad of) the preceding, and 

 joiniug the main body at about the middle of its length. Its 

 insertion is into the proximal third of the lower edge of the inner 

 side of the thyrohyal. 



Sternohyoid (fig. 1 — s. h.). — Has a bulky origin from the 

 sternum immediately superposed by the omohyoid, and from the 

 strong fascia investing the pectoralis major. Ic expands and thins 

 away as it proceeds to the inner side of the thyrohyal beneath the 



