276 ANATOMY OF THE RABBIT 



(h) The gemellus inferior. Origin: Posterior portion of the 

 superior ramus of the ischium and the ischial tuberosity. 

 Insertion: Trochanteric fossa. 



(i) The quadratus femoris. Origin: Ventral surface of the 

 ischial tuberosity and the superior ramus of the ischium 

 immediately in front of it. Insertion : The superficial fibres 

 are inserted on and below the third trochanter, the remain- 

 ing ones below the trochanteric fossa. 



(j) The obturator externus. Origin: External extent of the 

 obturator foramen. Insertion: Trochanteric fossa. The 

 muscle is largely concealed from this surface, but may be 

 fully displayed by the division of the pectineus and ad- 

 ductores brevis and longus. 



Dissect on the medial surface posteriorly, after examination 

 and division of the sartorius and the gracilis (p. 278). 



(k) The pectineus. Origin: Pecten of the pubis. Insertion: 

 Immediately below the lesser trochanter. 



(/) The adductor brevis. Origin: Anterior portion of the 

 symphysis pubis. Insertion: Below the pectineus. 



(w) The adductor longus. Origin: Posterior portion of the 

 symphysis and inferior ramus of the ischium. Insertion: 

 Posterior surface of the shaft of the femur to its distal third. 



(n) The adductor magnus. Origin: Ventral surface of the 

 ischial tuberosity. Insertion : Medial surface of the distal 

 end of the femur, extending to the medial condyle of the 

 tibia. 



3. Muscles arising from the pelvic girdle and the femur and in- 

 serted on the proximal portions of the tibia and fibula (extensors 

 and flexors of the leg) (Fig. 104). 



A. Extensor group (quadriceps femoris). The muscles lie for 

 the most part in front of the axis of the femur. They have a 

 common insertion on the tibial tuberosity through the patella and 

 the patellar ligament (the stout ligament connecting the patella 

 to the tuberosity of the tibia). 



(a) The rectus femoris. Origin in two portions. First portion: 

 Superior anterior spine, fused with the tensor fasciae latae. 



