1) The horseshoe kidney w ith a fusion of bilateral lower poles forming the so-called isthmus was found in the cadaver of 72 year old male. 2) The position of this kidney was lower than the normal one by one vertebral body height on the right and by two vertebral body height on the left. Bilateral ureters descended the ventral side of the isthmus. 3) Abnormal arteries in this case included the a) two arteries distributing over the right kidney from the abdominal aorta, b) one artery from the abdominal aorta, a small branch from the inferior mesenteric artery and one branch (left) from the middle sacral artery distributing over the left kidney, and c) one branch (right) from the middle sacral artery distributing over the isthmus. 4) Both renal hill faced the ventral sid e, with a marked hypoplasia of the left hilus. 5) No malformations other than the horseshoe kidney were in other organs.
The lungs of 15 cases of F r anciscana, Pontoporia blainvillei (body length 84.5-171.0 cm) were observed macro- and light microscopically. The lungs are slender and located on the dorsal side of the thoracic and upper abdominal cavities. Pulmonary hill are located in a very high position. No lobulations can be seen on either the right or the left lungs.