821 







5270. The right ectocuneiform, or ' os cuneiforme externum.' 



This is considerably larger than in the Chimpanzee, but the increase is chiefly in the 

 antero-posterior direction. The navicular surface is more oblong, the posterior cuboidal sur- 

 face is larger and more widely separated from the anterior one, and the surface for the middle 

 metatarsal is nearly similar in size and shape. 



5271. The right cubo'ides. 



This bone is larger in all its dimensions than the corresponding one in the Chimpanzee, 

 but the anterior surface for the ectocuneiform is much less ; the calcaueal and metatarsal 

 facets, which are divided only by the peroneal groove in the Chimpanzee, are here separated 

 by a tuberosity as well as by a groove. The inferior tuberosity in Man is less prominent and 

 definite, but the rough inferior surface behind it is much more extensive. 



5272. The metatarsal of the right hallux, or great toe. 



This is rather longer and is much thicker and more expanded, especially at its distal end, 

 than in the Chimpanzee. The chief difference is in the form of the proximal articular sur- 

 face, which is almost flat, not concave as in the Chimpanzee. The distal condyle is less pro- 

 minent than in the Chimpanzee. 



5273. The metatarsal of the right second toe. 



Its length is the same as in the Chimpanzee, but it is of less vertical breadth, and its upper 

 surface is straight, whilst the whole bone in the Chimpanzee is bent towards the sole. The 

 surface for the entocuneiform is smaller : there is also an additional inferior surface for the 

 ectocuneiform which does not exist in the Chimpanzee. 



5274 The metatarsal of the right third toe. 



It presents the same general differences of shape as compared with that in the Chimpanzee 

 which were noticed in the foregoing metatarsal. The proximal articular surface has the notch 

 on the outer, but not that on the inner side as in the Chimpanzee. 



5275. The mjetatarsal of the right fourth toe. 



Besides the differences of shape and curvature of the shaft, the proximal articulation is 

 flatter and more distinct from that for the third metatarsal. 



5276. The metatarsal of the right fifth toe. 



This differs in a greater degree from the fifth metatarsal in the Chimpanzee by its superior 

 transverse extent, the shaft being slightly flattened from above downwards, whilst in the 



