1897.] NATURAL SCIENCES OF PHILADELPHIA. 49 



cessions. The mass arising from the lower half of the front of the 

 femur is normal. 



The leg can be extended on the thigh scarcely to a right angle. 

 Yet the great bulk of the Quadriceps is requited to do this much. 



The patella is small (4 mm. -(- 2b mm.) while the patellar groove 

 on the femur is deep and long. This notch is much deeper on the 

 outer than the inner side. The patella scarcely occupies the groove 

 but lies well toward the intercondyloid notch. 



The Plantaris passes almost entirely to the first toe, a fibrous band 

 passing to the base of the first phalanx of the second toe and 

 another joining the Transversalis pedis superficialis. 



The Extensor longus digitorum pedis passes to the outer side of 

 the tibia as the Tibialis anticus and Extensor longus pollicis pass to 

 the inner side. It lies beneath the annular ligament and directly 

 in front of the ankle joint, though above the calcaneum it passes 

 under a special ligament which holds it close to the bone last named. 

 At the mid-tarsal region it again passes beneath a special ligament 

 and forms two aponeurotic expansions, the inner supplying the sec- 

 ond, third and fourth, and the outer the third, fourth and fifth dig- 

 its. Tracing these tendons back to their origin it is found that the 

 outer division retains the largest fleshy fascicle. 



The Peroneus longus (Peroneus primus of Burmeister). — This 

 muscle exerts no action on the entire foot except in its effect on the 

 first metatarsal bone. Traction pulls the bone forcibly inward by a 

 bold free motion. It has no effect on the cuboid bone. 



The Flexor communis digitorum is a large, powerful muscle. It 

 arises from the tibia by fleshy fibres half way down the posterior 

 surface of the shaft. It unites with the Flexor longus pollicis pedis 

 to form one tendon at the mid-tarsal region. At this point a strong 

 tenaculum (which serves as a check to extreme contraction) attaches 

 itself to the under surface of the common tendon and holds it to the 

 calcaneum. I venture to call the Lumb'ricales the para-fascicles. 

 The first toe has none ; the second one ; the third three ; the fourth 

 two ; and the fifth toes one para-fascicle. 



The Tibialis posticus is very small ; it arises high up in the leg and 

 is chiefly derived from the fibula and the interosseous membrane. 

 The slender thread-like tendon is inserted upon the scaphoid bone. 



The Abductor externus minimi digiti is the same as described by 

 Burmeister. 



