DISSECTION OF THE DOG 



119 



nerve are to be found. The muscles exposed are the three rhomboids, 

 the omo-transverse and the latissimus dorsi. 



M. rhomboideus cervicalis. — The cervical rhomboid takes origin from 

 the ligamentum nucha? as far towards the head as a level with the second or 

 third cervical vertebra, and from the spinous processes of the first two or three 

 thoracic vertebra?. It is inserted into the medial face of the cranial angle 

 of the scapula. 



m. serratus dorsalis 



\ m. ilio-costalis 



m. rhomboideus 

 cervicalis 



a. subscapidaris . 



m. rhomboideus 



in. splenius 



I 

 1 



4 6.1k 



rf 



5qp- 



V 3 i > 



m. longus capitis 

 m. serratus ventralis 



m. obliquus 

 abdominis externus 



"^•m. supraspinatus 

 '" m. infraspinatus 



v ^ m. teres major 

 n. to m. deltoideus 



m. rectus 



abdominis ' 



m. serratus 



ventralis / / 



m. pectoralis / 

 profundus , 

 a. circumflexa. 

 humeri posterior 



jfcgLl-gS %%%} m. triceps brachii 



Fig. 45. — Dissection of the shoulder after removal of the more superficial muscles. 



M. rhomboideus capitis. — This might reasonably be described as a part 

 of the cervical rhomboid, since the two blend towards a common insertion. 

 The muscle consists of a thin strip arising from the occipital bone. 



M. rhomboideus thoracalis. — The thoracic rhomboid is a very much 

 shorter and feebler muscle than the cervical rhomboid. It arises from the 

 spinous processes of the fourth to the sixth or seventh thoracic vertebras, and 

 is attached to the scapula immediately caudal to the insertion of the cervical 

 rhomboid. 



M. omo-transversarius. — The omo-transverse is a band-like muscle 

 running from the wing of the atlas to the distal part of the spine of the 

 scapula and the fascia over the deltoid. 



