Pickerel, pyloric valve of, [45]
stomach of, [44]

Pinnipedia, ileo-colic junction of, [212]

Pipa, stomach of, [46]

Piscivorous divers, cæca of, [203]

Pithecia satanas, ileo-colic junction and cæcum of, [215]

Placental circulation, [146]

Placentalia, definition of, [36]

Plates, medullary, [21], [28]

Platypus anatinus, male genito-urinary tract and cloaca, [26]

Pleuronectes maculatus, ileo-colic junction of, [201]
pyloric appendices in, [120]