The =profundus ulnaris= originates at the volar surface of the hand, proceeds in company with the ulnar artery, and sends on the base of the hand small anastomotic veins to the vena cutanea ulnaris or basilica. It passes along the anterior arm and between the flexor carpi ulnaris and the pronator profundus muscle to the elbow-joint. On the median surface of the biceps it passes upward and anastomoses with the radial vein. The ulnar vein, in the region of the elbow-joint, receives a large lateral branch which extends around the end tendon of the biceps and anastomoses above with the vena basilica. The =vena basilica= or cutanea ulnaris is a long vein which originates from the subcutaneous dorsal surface of the index-finger. Near the base of the hand it receives an anastomosing branch from the vena radialis and the vena ulnaris, and then passes upward along the posterior rim of the ulna. It receives numerous branches from the roots of the flight feathers. It crosses below the elbow-joint and reaches the volar surface of the arm. It receives a large branch from the ulnar vein, and then, passing in a diagonal and median direction to the triceps, extends to the shoulder cavity where it empties into the axillary vein. The outer breast veins unite forming a trunk which crosses ventrally to the subclavian artery, and empties into the subclavian vein. The vena cutanea abdomino-pectoralis collects the blood from a large skin area of the abdomen, the upper thigh, the breast, and the intercostal region. In the skin of the abdomen it forms a network. BRANCHES OF THE ILIACS ( Vena metatarsalis ( Vena metatarsalis ( Vena ( interna or magna ( plantaris profunda ( tibialis ( Vena tibialis antica ( postica ( Vena metatarsalis ( Venæ metatarsales ( ( externa ( ( Vena ( Vena metatarsalis dorsalis profunda ( Vena ( tibialis ( Vena metatarsalis dorsalis interna ( poplitealis ( antica ( Vena peronealis ( ( Vena cutanea cruralis ( ( Venæ surales Vena ( iliaca ( ( Vena cutanea abdominalis femoralis externa ( Vena ( Vena femoralis interna profunda ( cruralis ( Vena femoralis anterior ( ( Vena epigastrica The main trunk passes in the median abdominal line forward and then upward, along the outer edge of the pectoralis major, over the first sternal rib; receives blood from the infrascapular vein, and empties into the pectoralis externa.