The Muscles 99 
ziehers or vorderen grossen gezahnten Muskels, 
Pars anterior m. serrati antici majoris, Theil 
des Grand dentelé, 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 vertebre (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. 
Rhomboideus (Plate I., Fig. 3, rh) (Rautenmuskel, 
Angulaire de l’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 vertebree; 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 secundze 
superioris costz, Petit dentelé, Pectoralis minor, 
Pectoralis). This is a broad muscle of considerable 
