The Muscles 97 



sterno-mastoideus, anterior part of atlanti-mas- 

 toideus) ; (b) a posterior part or sterno-atlanticus 

 (Plate I., Figs, i and 2, est") (sterno-mastoideus, 

 inner belly of the "hcad-nodder, " posterior part 

 of the sterno-atlanticus). The former part is a 

 rather short but not weak muscle that arises from 

 the squamosum and inserts itself on the rib of the 

 atlas (alligator) or of the atlas and epistropheus 

 (crocodile) . 



The latter part is fairly strong and exceeds the 

 anterior part in length; it springs from the rib of 

 the first cervical vertebra, opposite the insertion 

 of the anterior part, and inserts itself on the ante- 

 rior border of the outer surface near the episternum. 

 At times superficial fibers pass into the pectoral 

 fascia. 



Dorso-scapularis (Cucullaris) (Plate I., Figs, i 

 and 2, Cu) (Trapezius). A broad but thin muscle 

 that begins as an aponeurosis from the dorsal 

 fascia in the middle line of the hinder part of the 

 neck and beginning of the back; with converging 

 fibers it passes within to insert itself partly on the 

 spine of the scapula and partly by superficial 

 fibers in the fascia that cover the deltoides scap- 

 ularis inferior muscle. 



Collo-scapularis Siiperficialis (Plate I., Fig. i, 

 cssp) (Levator scapulae superficialis, Levator scap- 

 ulae, Heber des Schulterblatts, Acromio-trachelien, 

 Teil des Serratus magnus, Levator anguli scap- 

 ulae). A considerable muscle on the side of the 



