258 Prof. J. C. Galton on the Myologij 



the middle of the terminal tendon of the gracilis, being covered 

 by this muscle at insertion. 



The semimembranosus arises from the tuber ischii below the 

 second portion of the semitendinosus, covered by the lowest 

 fibres of origin of the gracilis, and is inserted tendinously into 

 the tibia, posterior to the internal lateral ligament, and mid- 

 way between the terminations of the two fascicles of the semi- 

 tendinosus. Cuvier represents (pi. 258. fig. 2) this muscle as 

 made up of two slips, which are inserted just above the 

 " accessoire femoral du demi-nerveux." 



The biceps femoris arose from the tuber ischii in company 

 with the superior division of the semitendinosus, and was in- 

 serted into the outer part of the tubercle of the tibia which 

 affords insertion to the ligamentum patella by a strong tendon 

 continuous with the fascia covering the outer aspect of the 



An accessory portion (Cuvier), quite distinct from the above, 

 fan-shaped, took origin from that part of the outer edge of the 

 femur which is included between the great trochanter and the 

 termination of the gluteus maximus. It gradually tapered 

 towards its insertion (passing in its course over the peroneal 

 nerve), which was eftected by tendon into the fibula, at the 

 junction of its third with its lowest fourth. 



The gastrocnemius was made up, as usual, of two muscular 

 bellies : — 



1. Outer, rising from the outer aspect of the external con- 

 dyle, between the origin of the plantaris and the external 

 lateral ligament, the innermost and deeper fibres of origin 

 arising from the sesamoid from which the popliteus takes 

 origin. 



2. Inner and larger, rising from the inner and inferior sur- 

 face of the internal condyle. These bellies unite, about half- 

 way down the calf, into a tendo Achillis, which is inserted 

 into the calcaneum. 



The soleus, a very well-developed muscle, arose from the 

 fibula for about three-fourths of its length, and was inserted 

 by a strong tendon into the calcaneum, in advance of the 

 tendo Achillis. 



The popliteus was well developed. It arose from an elon- 

 gated sesamoid bone (Meckel, Archiv, pp. 28, 53) which pror 

 jects at the inferior aspect of the knee-joint, posterior to the 

 external lateral ligament. It then passed obliquely downwards 

 to its insertion at the upper third of the tibia, the lower border 

 of its terminal portion blending with the tibial fibres of origin 

 of the tibialis posticus. 



A similar sesamoid is present in the head of the popliteus 



