The Muscles 99 



ziehers or vorderen grossen gezahnten Muskels, 

 Pars anterior m. serrati antici ma j oris, Theil 

 des Grand dentele, Theil des Serratus magnus). 

 This muscle arises in varying extent from the 

 transverse process of the fifth cervical vertebra 

 to the first (crocodile) or second (alligator) ribs. 

 It is inserted on the inner surface of the supra- 

 scapula, except on its forward part, and is made up 

 of two layers — a superficial and a deep one. The 

 former layer (Fig. 3, cthspr') is weakly developed 

 and is composed of two or three thin, distinct 

 bundles, that extend from the ribs of the eighth, 

 ninth, and eleventh vertebrae (alligator) or from 

 the transverse process of the seventh vertebra 

 and the rib of the tenth. The deeper layer is 

 considerably developed; its bundles come, in the 

 alligator, from the fifth to tenth vertebrae; in 

 the crocodile from the fifth to ninth. 



RJwmboideus (Plate I., Fig. 3, rh) (Rautenmuskel, 

 Angulaire de I'omoplate). This is a very small, 

 independent muscle that springs, by two or three 

 distinct bundles, from the fascia covering the 

 longissimus dorsi muscle, in the region of the 

 eighth and ninth vertebrae; after a short course it 

 inserts itself on the antero-dorsal angle of the 

 suprascapula. 



Costo-coracoideus (Plate I., Fig. 3, cc) (Sub- 

 clavius et Triangularis sterni and Levator secundae 

 superioris cost^, Petit dentele, Pectoralis minor, 

 Pectoralis) . This is a broad muscle of considerable 



