In vol. xxi of the Archivio (1900) the author published a note on some cases of morphological anomalies of the extremities in the insane; and in the present paper he records the result of an autopsy on one of these patients—an hereditary degenerate with partial syndactylism of the right hand. Several anomalies were found in the bones of the hand and in the muscles of the forearm. The osseous abnormalities were most notable in the second phalanges; in two fingers (index and middle) that phalanx was absent; in the ring and little fingers it was rudimentary, and in the latter it was partially blended with the ungual phalanx. The ungual phalanges of the index and middle fingers were united, and bore a single nail. The os magnum and unciform bone were blended. The rest of the hand skeleton was normal. The muscles of the hand and forearm were all somewhat atrophic. Their most important anomalies were the absence of the extensor indicis and of the tendon of the flexor sublimis digitorum to the little finger, and a reversal of the ordinary arrangement of the flexor tendons, the deep flexor being perforated by the tendons of the superficial muscle.