Suspensory ligament of liver, derived from ventral mesogastrium, 165 _Sus scrofa_, ileo-colic junction and caecum of, 209 spiral valve of gastric diverticulum in, 48 Symmetrical type of ileo-colic junction, 221 Taenia coli-, 199 _Tamandua_, alimentary tract of, 56 _bivittata_, foramen of Winslow in, 183 ileo-colic junction and caeca of, 208 stomach of, 51 _Tapirus americanus_, ileo-colic junction and caecum of, 210 _Tarsius_, biliary ducts in, 145 _spectrum_, ileo-colic junction and caecum of, 213 _Taxidea americana_, ileo-colic junction of, 212 _Tatusia novemcincta_, ileo-colic junction of, 207 Teleosts, anal and genito-urinary orifices in, 25 concealed pancreas of, 117 development of liver in, 143 gastric diverticula of, 47 intestinal canal of, 191 stomach of, 46, 47 without pyloric appendices, 120 _Thalassochelys_, intestinal folds of, 197 Thymus, derivation of, 34 _Thynnus_, pyloric appendices in, 120 Thyroid, derivation of, 34 _Tolypeutes_, ileo-colic junction of, 207 Transverse anal fissure, 27 colon, development of, 54, 244 differentiation of, 76 mesocolon, development of, 80 _Trichosurus vulpinus_, ileo-colic junction and caecum of, 205 _Trigla_, biliary ducts in, 145 _Troglodytes niger_, ileo-colic junction and caecum of, 217 Types of ileo-caecal folds in Primates, 265 ileo-colic junction and caecum, phylogeny of, 217 Umbilical arteries, 63 hernia of embryo, 52 loop, derivation of adult intestinal segments from, 53 divisions of, 52 of embryonic intestine, 52 relation of vitello-intestinal duct to, 52 veins, 147 changes after birth in, 152 final arrangement, 151 further changes in, 149 intra-hepatic distribution, 152 vesicle, 22 Umbilicus, 21 Ungulata, caecal pouch of, 229 ileo-colic junction of, 209 Urinary bladder, in human embryos, 27 relation to allantois, 24 _Urinator imber_, diverticulum caecum vitelli, 35 _lumme_, diverticulum caecum vitelli, 35 pyloric valve of, 45 Urodaeum, 25 Urodele Amphibian, abdominal vein in, 157 caudal vein in, 156 ducts of Cuvier in, 156 hepatic-portal system of, 157 iliac vein in, 157 post-cardinal veins in, 157 post-cava in, 157 renal-portal system in, 156 venous system of, 156 Uro-genital cleft, 27 _Ursus_, ileo-colic junction of, 212 _maritimus_, intestinal villi, 195 Uvula, 42 Vagus, gastric distribution of, 43 Valves of Kerkring, 196, 197 Valvulae conniventes, 196, 197 Variations of caecum and appendix, 244 in the peritoneal relations of the appendix, 258 Vasa intestini tenuis, 66 Vascular mesenteric folds of ileo-colic junction, 262 system of liver, development of, 145 Vein, portal, development of, 148