220 
(e) 
(f) 
(g) 
(h) 
(i) 
(3) 
(k) 
ANATOMY OF THE RABBIT. 
fascia of the lateral surface of the thigh. The muscle is 
fused with the first head of the rectus femoris in front, and 
with the second portion of the glutaeus maximus behind. 
The piriformis. Origin: Lateral portions of the second 
and third sacral vertebrae. Insertion: Tip of the great 
trochanter. 
The muscle should be divided, care being taken to avoid injury to 
the nerves and bloodvessels beneath it. 
The gemellus superior. Origin: Tendinous from the 
ischial spine and fleshy from the body of the ischium imme- 
diately in front of it. Insertion: Lateral wall of the tro- 
chanteric fossa. 
The muscle extending from the ischial spine to the sacrum is the 
abductor caudae anterior (p. 270). 
The obturator internus. Origin: Internal extent of the 
obturator foramen. Insertion: Trochanteric fossa. The 
muscle passes over the ischium in the lesser sciatic notch, 
only its insertion portion appearing from the lateral surface. 
To see its origin, reflect the tendon through the lesser sciatic 
notch and examine the muscle from the internal surface 
of the pelvis. 
The gemellus inferior. Origin: Posterior portion of the 
superior ramus of the ischium and the ischial tuberosity. 
Insertion: Trochanteric fossa. 
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 remaining 
ones below the trochanteric fossa. : 
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 pectmens and adduc- 
tores brevis and longus. 
Dissection on the medial surface posteriorly, after division of 
the gracilis. 
The pectineus. Origin: Pecten of the pubis. Insertion 
Immediately below the lesser trochanter. 
