124 The Alligator and Its Allies 



ered by the origins of the ischio-femoralis, pubi- 

 ischio-tibialis, and flexor tibialis internus muscles. 

 It is inserted, by a strong, short tendon, on the tro- 

 chanter, somewhat caudad to the insertion of the 

 pubi-ischio-femoralis internus. 



Pubi-ischio-femoralis Internus (Plate III., Fig. i, 

 p. is. f. int., Plate IV., Figs. I and 2, p. is. f. int.) 

 (as a whole: Iliacus internus -j-Quatuor pectinei 

 [partimj; in parts: I. and II.: Kamm-Muskeln, 

 Pectineus inferior [I.] -{-superior [II.], Marsupialis 

 internus, Obturator internus; III., Iliacus [Darm- 

 beinmuskel], Iliacus internus). This muscle 

 arises by two or three parts: I. The anterior 

 arises, without tendon, from the greater part of 

 the inner and anteriorly directed surface of the 

 pubis; median to this, in the alligator, is a small 

 bundle, II., which unites with part I. These 

 unite with the pubi-ischio-femoralis externus to 

 form a strong tendon that is inserted on the tro- 

 chanter. 



III. This is a larger muscle that springs with- 

 out tendon from the inner surface of the body and 

 transverse processes of the twenty-fifth and twenty- 

 sixth (in alligator) vertebras, from the part of the 

 ilium that lies between these transverse processes 

 and the ischium, and from a small part of the 

 ischium. It is inserted on the whole inner sur- 

 face of the proximal third of the femur. 



Pnbi-ischio-femoralis Posterior (Plate III., Fig. 

 i, p. is. f. post., Plate IV., Figs, i and 4, p. is. f. 



