46 STUDIES IN COMPARATIVE ANATOMY. 



the fibres are rather closely connected with those of olliquus 

 superior. 



l^ot identified in C. and L. 



Rectus capitis lateralis extends from the transverse process of 

 the atlas to the mastoid process, lying along the anterior border 

 of trachelo-mastoideus. 



Not in C. and L. 



Intertransversales are present, stretching as usual between 

 transverse processes. The longest lie between the atlas and axis. 



Muscles of the Tail. 



Cuvier and Laurillard figure an ischio-caudalis (274-5, Q ; 

 282, lower figure, Q), a sacro-coccygeus superior (274-5, E; 282, 

 lower figure, E) and a sacro-coccygeus inferior (274-5, E^). The 

 names indicate the bony attachments. 



Anterior Vertebral Muscles. 



Rectus capitis anticus major arises from a prominent tubercle 

 upon the sixth cervical vertebra, and is inserted mainly into the 

 ventral surfaces of the atlas and axis, a small slip passing to the 

 third vertebra. 



C. and L.— 287-8 (M) ; 290-1 ( + 6 ?). 



Rectus capitis anticus minor is a small muscle internal to the 

 last, which arises by thin slips from the third, fourth, and fifth 

 cervical vertebree. It passes upwards and forwards, converging 

 towards its fellow, which it meets close to its insertion into the 

 base of the basilar process. 



C. and L.— 290-1 (not lettered). 



Longus colli is a much stronger muscle, lying symmetrically 

 upon each side of the middle line and internal to the last. The 

 muscles of both sides form together a triangular mass in front of 

 the centre of the cervical vertebrae. They arise from the trans- 

 verse processes of the third, fourth, and fifth cervical vertebrae ; 

 also from the front of the bodies of the third, fourth, fifth, and 

 sixth dorsal vertebrae, and from the heads of the corresponding 

 ribs, and are inserted into the tubercle of the atlas. 



C. and L.— 290-1 (o). 



