Anatomy of the Alligator. 

 Shoulder- Joint. 



291 



'■{ 



Triceps 



Teres major .... 

 Latissimus dorsi 

 Subscapularis . . 

 Pectoralis major 

 Pectoralis minor 

 Biceps humeri. . 



Deltoideus 



Spinati , 



Total 15-71 oz.av. 



The resultant moment of latissimus dorsi and subscapularis 

 passes through a line coinciding almost exactly with the line 

 of teres major ; and these three muscles are intimately asso- 

 ciated in their action. 



If we arrange the pelvic and scapular muscles in parallel 

 columns according to their admitted relationships, we shall 

 obtain the following comparative table : — 



Comparison of Pelvic and Scapular Muscles. 



Pehic Muscles. 



Scapular Muscles, 



r Rectus femoris "I ^o 



-, J Sartorius j • • • • 



• j Iliacus I 230 



[ Psoas magnus J 

 2. Marsupiales 45° 



rGraciUs ] 



I Peetineus l 



3.-<( Adductor brevis J 



I Adductor magnus 1 



1^ Adductor longus J 



4. Obturator externus 



p. f Quadratus femoris 1 



■ ( Ext. fem. caudaUs J 



f Biceps femoris 1 



6. \ Semitendinosus j- 217° 

 [ Semimembranosus J 



7. Glutei 266° 



106= 



125° 

 149° 

 194° 



' Triceps humeri 0° 



Teres major 2° 



Subscapularis — 14° 



Latissimus dorsi . . . . + 14° 

 Wanting. 



3. Pectoralis major .... 129° 



4. Wanting. 



5. PectoraHs minor .... 190° 



6. Biceps humeri 258° 



Deltoideus 310° 



Spinati 342° 



Many important deductions might be made from the pre- 



