Figure 4.

Line drawing of selected bones from the H. laietanus partial hand IPS18800 from Can Llobateres, showing the main anatomical features discussed in the text: (a) fourth metacarpal in distal, (b) dorsal, (c) radial and (d) palmar views, (e) fourth proximal phalanx in palmar view, (f) third proximal phalanx in palmar, (g) radial and (h) dorsal views, third intermediate phalanx in (i) radial and (j) palmar views, possible fourth distal phalanx in (k) radial and (l) palmar views. Characters: 1, enlarged pits for the collateral ligaments; 2, marked dorsal constriction of metacarpal heads; 3, smooth palmar surface of metacarpal heads; 4, enlarged ulnar tubercle; 5, protruding radial tubercle; 6, deep groove for channelling the long flexor tendons; 7, well-developed palmar tubercles; 8, dorsal extension of the proximal articular surface; 9, strong and distally positioned flexor sheath ridges; 10, palmarly bent trochlea; 11, well-developed insertions for the superficial flexors; 12, conspicuous muscular insertions at the palmar side only; 13, larger palmar lips.