VOL. XXVII.] PHILOSOPHICAL TRANSACTIONS. 585 



inches round; the second bone is in figure not unlike the former, but not di- 

 vided; from the right to the left 2 inches, and from above to behind 1 inch; 

 weigh 4§. The first bone of the fifth toe is 2-1- inches long, and 4-i^ inches 

 round; its second bone is in figure like the former, but less, and divided; 

 weight 3f . The first bone of the sixth toe is 2 inches long, and 4-^ inches 

 round; larger at the upper and becoming narrower at its lower extremity, 

 wherewith a very small bone is articulated, and weighs l^f . 



Besides all these, there are 2 ossa sesamoidea, which are affixed to the lower part 

 of the lower extremity of each bone of the metacarpus, each being about J 

 inch long, -l inch broad, protuberant at the lower part, and concave at their 

 upper, or that side where they are articulated with the metacarpus; separated 

 from each other by a cartilage, which ran down in the middle of this lower 

 epiphysis of the bone in the metacarpus. These ossa sesamoidea were very 

 useful for supporting the foot; for about their middle all the four hoofs of the 

 fore foot terminated. They weigh each f ij. 



The hind extremities consist of the ossa innominata, the thigh bone, the two 

 bones of the leg, and the foot. The ossa innominata consisting, as in other 

 animals, of two large bones, articulated behind with the os sacrum, on each 

 side, and before with each other per synchondrosin, as it is called: each may be 

 divided, as in human subjects, into the ilion, or upper and external part, os 

 pubis, or lower and fore part, and ischion, or lower and back part ; though 

 strictly speaking, these bones here should only be divided into the ilion and 

 pubis, there being no remarkable part about them which deserves to be pointed 

 out by the name of ischion. Both these ossa innominata joined together make 

 up the pelvis, which in circumference is 4 feet 6 inches. From the os sacrum 

 above, to the upper part of the os pubis below, it is 1 8 inches, and from the 

 right to the left 17 inches. The os pubis at the articulation is from above to 

 below 12 inches; between the two outer and lower extremities of the ilion, 

 from the right to the left is l-i- foot; from the os sacrum above, along the mar- 

 gin of the OS ilion, down to the fore-mentioned utmost point, is 2 feet 9 1- inches; 

 and from that same point to the acetabulum, which receives the femur, 1 foot. 

 This acetabulum is in circumference, round the external edge, 18 inches. The 

 breadth of the os ilion, from the external edge to the side of the pelvis, is 13 

 inches. Round the neck of the ilion above the acetabulum is 14 inches. The 

 ossa innominata, from the upper part of the ilion to the acetabulum, 22 inches. 

 The breadth of the os pubis, from the articulation with its partner to the out- 

 side 8 inches. The length of the oval hole for the musculus marsupialis 3-i-, 

 its breadth 4, its circumference 13 inches. Between the lower and utmost ex- 

 tremities of the OS pubis behind 1 7 inches. These ossa innominata are flat be- 



VOL. v. 4 F 



