REPORT ON THE SPHENISCID^. 77 



2. Rhomboideus. 



Rhomboide, Vicq d'Azyr, 1772, p. 630, No. 2. 



Rhomhdide, Cuvier, vol. i. p. 263. 



Rautenmuskel, Wiedemann, p. 82. 



Rhomboideus 7najor et minor, Tiedemann, p. 303, Nos. 2 and 3. 



Rhomboide, Meckel, vol. vi. p. 23, No. 2. 



Rhomboideus, Schoepss, p. 92, No. 7. 



Rhomboideus, Selenka, vol. vi. p. 108, No. 33. 



Rhomboide, Gervais and Alix, p. 21. 



Attachments. — The rhomboid muscle arises from the spinous processes of the dorsal 

 vertebrae, from the second to the seventh inclusive. The fibres pass outwards and slightly 

 backwards to be inserted into the posterior three-fourths of the vertebral border of the 

 scapula. 



Action. — The muscle contracting approximates the scapula to the vertebral column. 

 Its action, however, must difier somewhat from that of the trapezius, seeing that the 

 fibres of the latter pass oblic^uely outwards and forwards, whilst those of the rhomboid 

 muscle pass outwards and backwards. 



Relations. — Superficially the anterior and larger portion of this muscle is concealed by 

 the trapezius. Its deeper surface rests against the dorsal spinal muscles. 



Nerve supply. — A twig from the nerve which supplies the trapezius, derived through 

 the latter from the first cord of the brachial plexus. 



Variations. — In Spheniscus minor the origin of the rhomboid muscle is confined to 

 the spinous processes of the same vertebrae that afibrd attachment to the trapezius. 



3. Serratus anticus major. 



Soiis-scapidaire, Vicq d'Azyr, 1772, p. 632, No. 6. 



Grand dentele, Cuvier, vol. i. p. 262. 



Rildiwiirtszieher des Schulterblattes, Merrem, p. 154, No. 10. 



SdgemiLskel, Wiedemann, p. 87. 



Serratus magnus, Tiedemann, p. 304, No. 5. 



Grand dentele anterieur, Meckel, vol. vi. p. 24, No. 6. 



Der grosse vordere Sdgemiiskd, Schoepss, p. 94, No. 8. 



Serratus anticus (part of), Selenka, vol. vi. p. 110, No. 35. 



Grand dentele posterieur, Gervais and Alix, p. 20. 



Attachments. — This muscle arises by means of three distinct digitations from the 

 outer surfaces of the fourth, fifth, and sixth vertebral ribs, close to the junction of these 

 with their sternal segments. The fibres pass almost vertically upwards, and are inserted 

 into the external border of the posterior extremity of the scapula. 



Action. — The muscle draws the posterior angle of the scapula downwards towards 

 the sternum. 



