30 Leach, The Myology of the Bell-Magpie. [.sf'jui • 



interesting muscle. It extends for the whole length of the neck, 

 has many origins and many insertions. It arises directly from 

 the muscles along the vertebrae of the back, and also as a 

 gUstening fine tendon from the neural spine of the first and 

 second thoracic vertebrae. It joins the longissimus dorsi (130) 

 by a fleshy muscle, and gives off six distinct slips, which increase 

 in length up the neck, as shown in the figure. These slips insert 

 into the postzygapophyses of successive vertebrae, and also join 

 the obliqmts colli muscles (131), which are inserted into the same 

 structures [50]. Six other ribbon-like slips run forward to join 

 the main body of 128. The most posterior arises from the neural 

 spine of the seventh vertebra. The other five arise similarly 

 from the neural spine of successive vertebrae and join the same 

 narrow muscle band to run forward to be inserted into the 

 transverse process of the axis vertebra. 



129. The sacro-lumbalis [49] [50] is closely blended with the 

 next muscle, the longissimus dorsi (130). It is the outer part of 

 a mass that rises along the sides of the vertebrae and on the ribs. 

 It arises from the anterior end of the ihum, from the space 

 between the ilia, and from the transverse processes of the dorsal 

 vertebrae. It makes insertions to the first dorsal and free ribs, 

 and is inserted into the diapophysis of the twelfth cervical 

 vertebra. 



130. The longissimus dorsi [49] [50] is between the last muscle 

 (129) and the neural crest of the dorsal vertebras. It is a mass 

 traversed by numerous tendons making attachments with ribs 

 and vertebrae. It arises as far back as possible in the angle 

 between the ilia and from the neural crest of the vertebrae, as 

 Shufeldt described for the American Raven. This muscle in 

 Strepera forms Xs of tendon on to the neural crests of the 

 vertebrae. It continues to make attachments and receive fibres 

 as it goes on to the base of the neck. It has four insertions on 

 the eleventh, twelfth, thirteenth, and fourteenth vertebrae 

 respectively. The last one resembles the first of the series of 

 seven fasciculi which make up the obliquus colli (131). It is also 

 continuous with the longus colli posticus (128). 



131. The obliquus colli [50] is made up of a series of seven 

 fasciculi of muscle on the side of the neck. The first links up, 

 as Shufeldt described in the Raven, the longus colli posticus (128), 

 the longissimus dorsi (130), and the sacro-lumbalis (129). The 

 first arises from the diapophysis of the eleventh vertebra, crosses 

 over the tenth, and is inserted into the postzygapophysis of the 

 ninth. It is joined by the third down branch from the longus 

 colli posticus (128), as shown in the diagram. The next oblique 

 section arises from the tenth vertebra, passes over the ninth, and 

 is inserted into the eighth. It receives the fourth branch from 

 muscle 128. The third, fourth, and fifth oblique sections arise 

 similarly, are inserted similarly, and are united with muscle 128 

 similarly. The sixth oblique section arises from the sixth 



