Fig. 1. Minke whale (Balaenoptera acutorostrata) flipper in (A) dorsal view and (B) leading edge view. Bones colored red, cartilage colored blue. Dotted lines indicate planes of section. (C–E) Flipper cross-sections along the (C) distal end of the flipper, (D) metacarpals and (E) distal radius and ulna. The cambered nature of the flipper is shown in D and E as the ventral surface of the flipper is more convex than the dorsal surface. The tapered trailing edge of the flipper was partially deformed during packaging for CT scanning, but normally would be in line with the chord axis. c, carpals; ct, dense connective tissue; h, humerus; mc, metacarpals; ol, olecranon process of the ulna; ph, phalanges; ps, cartilaginous anlage of the pisiform bone; r, radius; s, scapula; u, ulna. Scale bar, 5 cm.