416 ANIMAL MECHANICS. 



Muscular Types of Struthionidm — Hip Joint. 





Ostrich. 



Emu. 



Rhea. 



Casso- 

 wary. 



I. 



2. 

 3- 



4- 

 5. 

 6. 

 7- 



Abductors. 

 Agitator Cauda?, . . . . ) 

 Tensor vaginae femoris, . . 1 

 Glutaeus primus, .... 

 Glutaeus secundus, .... 

 Glutaeus tertius, .... 

 Gluteus quartus, .... 

 Obturator internus, . . . 



Per cent. 

 24.04 



6-73 

 0. 60 

 r. 01 

 8.79 



Per cent. 



24.36 



1 . 50 

 9.88 

 o.34 

 i-95 

 5-23 



Per cent. 

 2 4-33 



9-32 

 0.77 

 0.89 

 8.38 



Per cent. 

 25.08 



1 . 49 

 10. 90 

 0.32 

 2-53 

 5-44 



1. 

 2. 

 3. 



Flexors. 



3.5i 

 8.88 

 1 . 00 



None. 

 11. 91 

 °. l 5 



0.46 



9-5 6 

 0.27 



None. 

 15.82 

 0.08 



1. 

 2. 

 3- 

 4- 



Extensors. 



Semitendinosus, .... 

 Semitendinoso-accessorius, . 

 Semimembranosus, . . . 



21. 62 

 6.87 

 O.49 

 2.5O 



'8.57 

 7.87 



L '3 

 2. 03 



17.04 

 9.92 



1.49 

 2.40 



i5-4o 

 7.70 

 1.36 

 0.64 



r. 

 2. 

 3- 

 4- 

 5- 



Adductors. 

 Adductor primus, ...-.) 

 Adductor secundus, ... J 

 Adductor quartus, .... 

 Adductor quintus, .... 

 Obturator externus, . . . 



8.O3 



2.89 

 1.82 

 I. 22 



7.08 



2. 69 

 1.68 

 3.63 



9.07 



3-05 

 o-37 

 1 . 64 



4- 77 



5- 58 

 2.66 

 0.23 





IOO 



IOO 



IOO 



IOO 







Total weight, . . . 



Oz. av. 

 53-63 



If we combine these results in groups as before, we find 

 the following results : — 



