Pleuro-peritoneal cavity, [28]

Plicæ coli, [199]

Polypterus, pyloric appendix in, [120]

Portal circulation, development of, [147]
vein, development of, [148]

Position and peritoneal relations of appendix, [250]

Post-anal gut, [23]

Post-cardinal veins in Urodele Amphibian, [157]

Post-cava in Anure Amphibian, [158]
in Iguana, [159]
in Urodele Amphibian, [157]

Post-caval vein, [151]

Pre-cava in Anure Amphibian, [158]