Didelphis, ileo-cæcal folds of, [263]
virginiana, ileo-colic junction and cæcum of, [205]

Digitiform gland of Selachians, [201]

Dipnœans, intestinal canal of, [191]
spiral intestinal valve in, [119]

Diverticulum cæcum vitelli in birds, [35]
in Urinator imber, [35]
lumme, [35]
vateri, [114]

Dog, biliary ducts in, [145]

Dorsal mesentery, early condition and derivation, [32]
in lower vertebrates, [32]
smooth muscular fiber of, [33]
mesogastrium, area of adhesion to parietal peritoneum, [106]
developmental changes in direction and extent, [103]
definition of, [100], [101]
gastro-splenic segment, [108]
redundant omental growth, [105]
spleen and pancreas in cat, [126]
vertebro-splenic segment, [108]
vascular ileo-cæcal fold, [262]
fold, influence on shape of appendix, [271]

Double cæcal pouches of birds, [203]

Ducts of Cuvier, [147]
in Selachian, [155]
in Urodele amphibian, [156]
omphalo-mesenteric, [22]
of Santorini, [111]
vitello-intestinal, [22]
of Wirsung, [111]
development of, [112]

Ductus venosus, [149]
changes after birth in, [152]

Duodenal antrum, [194]
fold of cat, [92]
of Hapale vulgaris, [93]
inferior, [95]
of Nasua rufa, [92]
superior, [95]
fossæ, [92]
superior, [94]
vascular relations, [95], [96]
loop, [54]