190 THE MYOLOGY OF THE RAVEN. 



being the same in C//pseli and Troclnh, 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, altliough, as I say, each possesses 

 an entire posterior xiphoidal margin. 



" As in the case with the other muscles described in 

 the foregoing paragraphs, ornithotomists have a fine 

 field open before them Iq dissecting out this group of 

 thigh-muscles in our United States birds ; making full 

 notes upon their researches, and comparing carefully 

 with the W'ork 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, 

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

 and insertions, their relative size as compared with 

 other allied Ijirds, and in short their morphology in its 

 details," 



105. Tlic ohturator internui^ ^ in the Eaven, as in most 

 birds, is a l)ipenniform muscle which arises from the 

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



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

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

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



Gadow gives the following synonymy for it, it being his 3f. 

 ohturator (loc. cit., 171) : — 



'* 41. M. OBTUKATOR. 



M. qiiintus fern oris. Aldrovandi. 

 M. decimus J'emoris. Steno. 

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

 Iliacus internus. Wiedemann, p. 98. 

 Tiedemann, § 29;3. 

 Dritter Anzieher, Einwartszieher oder Kammmuskel. Meckel, 



System, p. 359, No. 10 ; ArcMv, p. 265, No. 11 u. 12. 

 Ohturator interne. Cuvier, p. 503. 

 Ohturatorius. d' Alton, p. 33. 



