504 SHUFELDT. [Vol. XVII. 



minute patella is present at the front of the knee-joint, and 

 it may exist in two pieces, mere ossific granules in the tendon 

 of the extensor femoris. 



The tibio-tarsus of this limb has also nearly a straight shaft, 

 of a subcylindrical form. Its pro- and ecto-cnemial processes 

 are not markedly produced, while distally its condyles are far 

 more prominent on their anterior aspect than they are behind. 

 Above them, in front, we note the usual little osseous bridge 

 beneath which in life pass certain tendons of the muscles of 

 the leg. 



The fibula is long and very slender, and articulates in the 

 usual manner with the femur and the tibia. Behind the internal 

 condyle of the tibio-tarsus there is to be seen quite a sizable 

 bony sesamoid, being of an elongated, concavo-convex form. 



Coming to the tarso-metatarsus , it is to be noted that it has 

 a length equaling rather more than half the length of the tibio- 

 tarsus, for the condyles of which latter it offers upon its proxi- 

 mal summit two very decided excavations for articulation. 



Its hypotarsus behind is jutting, short, and not especially 

 produced down the shaft. Most conspicuous mesially, it is for 

 the most part situated to the outer side of the bone, and 

 exhibits one complete perforation at its middle for the pas- 

 sage of a tendon, and externally at least two very distinct 

 groovelets for the same purpose. To the hinder side of the 

 hypotarsus the shaft is thin antero-posteriorly and is there 

 pierced by a foramen. A section made of the shaft of this 

 bone just above the accessory metatarsal would show nearly an 

 elliptical figure. The facet for articulation of this accessory 

 metatarsal is distinctly excavated, and the segment itself situ- 

 ated rather low upon the shaft is proximally twisted upon itself, 

 thus bringing its distal trochlea into the transverse position. 

 Thus Jiallux is brought low down, and its basal joint is the 

 longest of any in the foot. These podal joints of pes are upon 

 the usual ornithic plan of arrangement, and they present no 

 strong characters for us to seize upon. For any one of the 

 anterior toes its basal joint is the longest, while as we proceed 

 towards the ungual ones they become, in any case, a mite 

 shorter. 



