Congenital defects in a fowl II. A three-legged fowl-Polymelus with an extra hindlimb at the pelvic region

닭의 선천성결함(先天性缺陷) II. 1개(個)의 여분의 후지(後肢)가 신부(腎部)에 부착된 다지기형(多肢畸形)

The abnormal male Newhampshire of five months age with three hindlimbs was examined macroscopically and radiographically The external feature included two normal wings, two normal hindlimbs and an underdeveloped extra hindlimb, which was attached to the pelvic region. The extra hindlimb consisted of an underdeveloped femur like bone, tibiotarsus likebone, tarsometatarsus like bone and three rows of digits with claw. The femur like bone was fused with pelvic girdle like bone. The bones of extra hindlimb were fused into one except one row of digit, which was attached to the tibiotarsus like bone. Three ceca and one cloaca with two vents were also observed.