“Shows how the bones of the arm (q), forearm (q’x), and foot (o), are twisted to form an osseous screw."—Pettigrew, 1875
Pettigrew, J. Bell Animal Locomotion (New York, NY: D. Appleton & Company, 1874)
939×2400, 313.0 KiB
400×1024, 51.4 KiB
250×640, 27.1 KiB
125×320, 10.9 KiB