MUSCULAR SYSTEM OF MAMMALIA. 43 



the Ox, as in the Horse, is a comparatively small muscle, and acts 

 upon both humerus and antibrachium. The ' rhomboideus,' fig. 

 19, 9, is not single, as in the Horse and Giraffe, but consists in 

 the Ox of pre- and post-rhomboid portions : the former rises from 

 the nuchal ligament, as far forward as its occipital insertion : the 

 latter from the spines of the two or three anterior dorsals ; both 

 converge to be inserted into the base of the scapula. 



The 'splenius capitis,' fig. 19, 7, arises from the anterior dorsal 

 and posterior cervical spines ; the fibres diverge to a flat tendon 

 inserted into the paroccipital and the ridge rising therefrom. In 

 the Sheep an insertion of a small fasciculus into the diapophysis of 

 the atlas represents the ' splenius colli.' The c scaleni ' form three 

 strong muscles in the Camelidce, in the Giraffe four, which rise 

 from the fourth to the seventh cervical vertebras and are inserted 

 into the manubrium sterni and first rib. The • scalenus anticus ' 

 in the Cow is shown at 12, fig. 19. The ' sterno-maxillaris ' arises 

 from the manubrium and divides, at 9, fig. 18, to be inserted into 

 the paroccipital and mandibular angle. 



Deep muscles of the Cow. iv. 



The ' levator anguli scapulas,' fig. 19, 8, arises from the pleur- 

 apophyses of the third and fourth cervical vertebras, and is inserted 

 into the anterior angle of the scapula : it seems part of the follow- 

 ing muscle. 



The f serratus magnus,' fig. 19, 10, has an extensive origin 

 from the pleurapophyses of the anterior half or two-thirds of the 

 dorsal series, forward, to that of the fifth cervical inclusive, by 

 * dentations,' or an angular strip from each : the fibres converge, as- 

 cending beneath the scapula, to be inserted into the cartilaginous 

 suprascapula. Thus, as the fore-part of the trunk is, as it were, 

 slung upon the two great serrate muscles which principally support 



