Oryx leucoryx, ileo-colic junction and cæcum of, [210]
spiral colon of, [233]

Otolicnus crassicaudatus, ileo-colic junction and cæcum of, [213]

Ovis aries, spiral colon of, [233]

Ovum, structure of, [19]

Owl, stomach of, [50]

Pancreas, adhesion of, [67]
adhesion of mesoduodenal segment, [123]
in Ammocœtes, [117]
in Chelydra, [117]
comparative anatomy of, [116]
concealed, of Teleosts, [117]
derivation of, [34]
development of, in Amphibia, [115]
of, in cat, [115]
of, in chick, [115]
of, in fish, [115]
of, in lower vertebrates, [115]
of, in man, [111], [115]
of, in sheep, [115]
in fœtal pig, [123]
function of, [195]
in Myxinoids, [117]
peritoneal relations, [122]
vascular and visceral relations of adult, [125]
in Protopterus, [117]
relation to dorsal mesogastrium, [123]
to mesoduodenum, [122]
to omental bursa, [123]
in Selachians, [116]

Pancreatic ducts in Mammalia, [117]
normal arrangement, [113]
secondary, [111]
variations, [114]

Pancreatico-gastric folds in man, [187]
in Nasua rufa, [181]

Papilla Vateri, [114]

Paradoxurus typus, ileo-colic junction of, [212]