72 ME. F. G. PARSONS ON THE 



The Scalemis ventralis (anticus) is absent. 



The Scalenus longus rises from the Srd, 4th, 5th, and 6th 

 cervical transverse processes and is inserted into the first four 

 ribs. 



The Scalenus hrevis is dorsal to the last, it rises from the 

 6th cervical vertebra and is inserted into the first rib. 



Muscles of the Hind Lmib. 



As in most of the Mammalia, the sartorius, ectogluteus, caudo- 

 femoralis, and biceps form one sheet ; the only special point being 

 that between the sartorius and the ectogluteus tbere is no distinct 

 tensor fasciae femoris, unless the muscle which I here call ecto- 

 gluteus is really tensor fasciae femoris. 



The Sartorius runs from the iliac crest to the inner side of the 

 patella. I satisfied myself that it was supplied by the superior 

 gluteal nerve, a point of some little interest when the myology 

 of other mammals is considered. 



The Ectogluteus passes from the anterior caudal vertebrae and 

 sacrum, and is inserted chiefly into the fascia of the thigh, but 

 slightly into the third trochanter of the femur. 



The Caudo-femoralis {Agitator caudce') continues the origin of 

 the last muscle back along the caudal vertebrae, and is inserted 

 by a narrow tendon into the outer side of the top of the patella ; 

 in the buttock it is much thicker and more bulky than the 

 ectogluteus. 



The Biceps {Flexor cruris lateralis) is a one-headed muscle 

 rising from the tuber ischii ; it is inserted entirely into the fascia 

 of the leg from the knee halfway down. 



The Mesoqluteus (G-luteus medius) rises from the iliac crest 

 and sacrum, and is inserted into the outer side ot" the great 

 trochanter and somewhat below. 



The Entogluteus (6r. minimus) runs from the dorsal part of 

 the gluteal surface of the ilium to the top of the great trochanter. 



The Gluteus veoitralis {G. quartus-scansorius) rises from the 

 ventral part of the guteal surface of the ilium, and is inserted 

 into the front of the great trochanter. 



All the above-mentioned muscles, with the exception of the 

 biceps, are supplied by the superior gluteal nerve, which emerges 

 from the sciatic notch anterior to (cephalad) the pyriformis. The 

 biceps, however, is supplied by the nerve to the hamstrings 

 which comes out of the notch behind (caudad) the pyriformis. 



The Pectineus is sinale and small. 



