94 The Alligator and Its Allies 



inserted on the ventral surface of the coracoid at 

 the boundary of the scapula. 



Costo-scapularis (Collo-scapularis superficial, 

 Levator scapulas superficialis). See shoulder 

 muscles. 



Costo-vertebralis Medialis (Scaleni) . Fairly large, 

 flat, and long-drawn-out three-cornered muscle. 

 Attached by its base to the most anterior sternal 

 rib, by its upper border to the fifth cervical rib, 

 and by its point to the end of the second cervical 

 rib. 



Costo-vertebralis Lateralis (Longus colli). Origi- 

 nates thin and sharp on the body of the fifth 

 thoracic vertebra, increases in thickness slowly 

 but decidedly cephalad, then again becomes thinner 

 and inserts itself on the inner side of the ribs of the 

 most anterior two cervical vertebras. 



Collo-capitis (Rectus capitis anterior). Arises, 

 as a rule, from the cervical centra, at times from 

 the second thoracic vertebra (Gavialis). It ex- 

 tends forward and is inserted on the basi-occipital 

 and the hinder border of the pterygoid. For a 

 greater part of their length the two muscles lie 

 close together, but forward they separate somewhat 

 from each other. 



DORSAL NECK MUSCLES 



Occipito-cervicalis Medialis (Complexus cervicis, 

 Biventer cervicis, Zweibauchiger Strecker or Zwei- 



