On the Hair Streams on the Trunk and Extremities of Macacus cyclopsis

抄録

The stream of body hairs of 100 cadavers of adult Macacus cyclopsis (50 male,50 female) was observed and the following findings were obtained. The parts examined were the trunk and extremities.
1. Dorsal Region of Trunk
The hair streams of the back are continuations from the hair stream of the head and form a dispersive line over the spinal column, i. e., the midline, from which the descending hair stream gradually spread out. Those in the middle are continuous with the hair stream of the tail while those of the upper lateral region cross over the scapular region to become the hair stream of the upper extremity. The hair streams spreading down toward the lateral chest unite with the hair streams of the anterior chest and descend. to the flank where they continue with the hair streams of the abdominal region. In the dorso-lumbar region, the hair streams located in the lateral part continue with the hair streams of the lateral surface of the lower extremity while those in the medial part curve outward and run to the callus and the perineal region. There is considerable individual variation in the angle of the dispersive lines and sometimes the hair stream is disarranged by the formation of whorls, convergent points and dispersive points which generally are located in the region corresponding to the spina scapulae or along the spinal line.