File:Boyden1931 fig01.jpg

Fig. 1 Detail of same horseshoe kidney that is shown in plate 1; drawn from left side to display shape and relations of suprarenal gland. A’. 1, 2, 3, left renal arteries (1, dorsolateral branch of aorta in hiatus aorticus, arises at level of first lumbar vertebra; 2, lateral branch below superior mesenteric artery, at middle of second lumbar vertebra; 3, ventrolateral branch, from level of inferior mesenteric artery, between second and third lumbar vertebrae); A.Z,3, right renal arteries (see legend, pl. 1) ; Int.sp.m2., left internal spermatic veins (double); Supna. 1, 2, 3, left suprarenal arteries; Suprxv. 1, 2, 3, left suprarenal veins (note union of first two to form a vessel that resembles the adrenolumbar vein of quadrupeds) ; V’. 1, 2,3, 4, left renal veins; V. 4, fourth right renal vein: X, common trunk of right renal and internal spermatic veins.