190 THE MYOLOGY OF THE RAVEN. 



being the same in Cypseli and Trochih', their pelvic 

 limbs otherwise are by no means alike in other par- 

 ticulars ; and the sternum is, too, of a very different 

 pattern in each case, although, as I say, each possesses 

 an entire posterior xiphoidal margin. 



' As in the case with the other muscles described in 

 the foregoing paragraphs, oruithotomists have a fine 

 field open before them in dissecting out this group of 

 thigh-muscles in our United States birds ; making full 

 notes upon their researches, and comparing carefully 

 with the work already accomplished by the indefatigable 

 Garrod. In doing this, not merely the absence or pre- 

 sence of the five muscles last described should be noted, 

 but, if possible, full notes made as to their exact origins 

 and insertions, their relative size as compared witli 

 other allied birds, and in short their morphology in its 

 details." 



105. The obturator internus l in the Raven, as in most 

 birds, is a bipenniform muscle which arises from the 

 ventral surface of the ischium, as far back as to include 



1 Cuvier, even so far back as his time, considered this muscle to 

 be the " obturateur interne," and with but one or two exceptions, it 

 has universally been so regarded since the earlier works of Owen. 



Gadow gives the following synonymy for it, it being his M. 

 obturator Hoc. cit., 171) : 



" 41. M. OBTURATOR. 



M. quintus femoris. Aldrovandi. 

 M. decimus femoris. Steno. 

 L'iliaque interne. Vicq d'Azyr, p. 275. 

 Iliacus internus. Wiedemann, p. 98. 

 ,, Tiedemann, 293. 



Dritter Anzieher, Einwjirtszieher oder K.-uninmuskel. Meckel, 



fyistem, p. 359, No. 10 ; Archie, p. 265, No. 11 u. 12. 

 Obturator interne. Cuvier, p. 503. 

 Obturatorius. d' Alton, p. 33. 



