186 THE MYOLOGY OF THE RAVEN". 



" The accessory femoro-caudal (Fig. 64 bis) arises be- 

 neath the overarching part of the postacetabular portion 

 of the ilium, just behind the acetabulum and beyond. 

 Its fibres pass obliquely downwards and forwards to join 

 with those of the femoro-caudal, and to become inserted 

 with them into the upper part of the femur as already 

 described." 



104. The obturator externus 1 is a thick fleshy muscle 

 that arises from the posterior half of the periphery of 

 the ischiatic foramen and the concavity found 011 the 

 external surface of the lateral aspect of the pelvis be- 

 hind it ; its boundary above being the postacetabular 

 ridge, while its fascia is nearly carried to the posterior 

 pelvic margin behind (Fig. 24). From this origin it 

 passes directly toward the femur, its fibres converging 



1 The subjoined synonymy is from Gadow, loc. cit., p. 170 : 



" 40. M. ISCHIO-FEMORALIS. 



M. quartus femoris . Aldrovandi. 



M. duodecimus femoris. Steno. 



Le muscle qui tient la place du quarre. Vicq d'Azyr, p. 273, No. 10. 



Rotator femoris. Wiedeinann, p. 97. 



Obturator externus. Tiedernann, 289. 



Watson, p. 107. 



Zweiter Niederzieher, oder viereckiger Scbenkelmuskel, oder 



ausserer Huftbeiulochrnuskel. Meckel, System, p. 357, No. 6 ; 



Archiv, p. 265, No. 10. 



Le carre de la cuisse. Cuvier, p. 503 ; Milne-Edwards. 

 Gemellus superior, d' Alton, p. 32. 

 Glutceus maximus. Cones, p. 168. 

 Quadratus femoris. Guiit, p. 27. 



Selenka, p. 140, No. 79. 



De Man, p. 122, No. 6. 



Pyramidalis. Owen, Apieryx, p. 291 ; Kubl, p. 79. 

 Pyriformis. Quennerstedt, p. 19. 



,, Neander, p. 13. 



Le carre. Gervais et Alix, p. 32 ; Alix, p. 432. 

 M. ischio-femoralis. Gadow, No. 23." 



