218 METATARSUS. 



where the tendon of the peroneus primus muscle is inserted. 

 On its outside, an oblique circular depression is made by the 

 second metatarsal bone. Its round head has generally on its 

 forepart a middle ridge, and two oblong cavities, for the ossa 

 sesamoidea ; and, on the external side, a depression is made by 

 the following bone. 



Os metatarsi of the second tof is the longest of the five, with 

 a triangular base supported by the os cuneiforme medium, and 

 the external side produced into a process ; the end of which is 

 an oblique smooth plane, joined to the os cuneiforme externum. 

 Near the internal edge of the base, this bone has two small 

 depressions, made by the os cuneiforme maximum, between 

 which is a rough cavity. Farther forwards we may observe 

 a smooth protuberance, which is joined to a foregoing bone. 

 On the outside of the base are two oblong smooth surfaces for 

 its articulation with the following bone ; the superior smooth 

 surface being extended longitudinally, and the inferior perpendic- 

 ularly, between which there is a rough fossa. 



Os metatarsi of the middle toe is the second in length. Its 

 base, supported by the os cuneiforme externum, is triangular, 

 but slanting outwards, where it ends in a sharp-pointed little 

 process, and the angle below it is not completed. 



The internal side of this base is best adapted to the preceding 

 bone ; and the external side has also two smooth surfaces 

 covered with cartilage, but of a different figure ; for the upper 

 one is concave, and being round behind, turns smaller as it 

 advances forwards; and the lower surface is a little smooth, 

 convex, and very near the edge of the base. 



Os metatarsi of the fourth toe is nearly as long as the former, 

 with a triangular slanting base joined to the os cuboides, and 

 made round at its external angle ; having one hollow smooth 

 surface on the outside, where it is pressed upon by the following 

 bone ; and two on the internal side, corresponding to the former 

 bone, behind which is a long narrow surface impressed by the os 

 cuneiforme externum. 



Os metatarsi of the little toe is the shortest, situated with 

 its two flat sides above and below, and with the ridges laterally 



