"Columba livia. Part of left foot of an unhatched embryo. The cartilage is dotted. mtl. 2, second; mtl. 3, third; and mtl. 4, fourth metatarsal; ti, tibia; tl. 1, proximal tarsal cartilage; tl. 2, distal tarsal cartilage." -Parker, 1900

Rock Pigeon Embryo Foot

"Columba livia. Part of left foot of an unhatched embryo. The cartilage is dotted. mtl. 2, second; mtl.…