Hypertrophy of the digits is the result of many different processes, and true hypertrophy or gigantism must be differentiated from acromegaly, elephantiasis, leontiasis, and arthritis deformans, for which distinction the reader is referred to an article by Park. Park also calls attention to the difference between acquired gigantism, particularly of the finger and toes, and another condition of congenital gigantism, in which either after or before birth there is a relatively disproportionate, sometimes enormous, overgrowth of perhaps one finger or two, perhaps of a limited portion of a hand or foot, or possibly of a part of one of the limbs. The best collection of this kind of specimens is in the College of Surgeons in London. Curling quotes a most peculiar instance of hypertrophy of the fingers in a sickly girl. The middle and ring fingers of the right hand were of unusual size, the middle finger measuring 5 1/2 inches in length four inches in circumference. On the left hand the thumb and middle fingers were hypertrophied and the index finger was as long as the middle one of the right hand. The middle finger had a lateral curvature outward, due to a displacement of the extensor tendon. This affection resembled acromegaly. Curling cites similar cases, one in a Spanish gentleman, Governor of Luzon, in the Philippine Islands, in 1850, who had an extraordinary middle finger, which he concealed by carrying it in the breast of his coat. Hutchinson exhibited a photograph showing the absence of the radius and thumb, with shortening of the forearm. Conditions more or less approaching this had occurred in several members of the same family. In some they were associated with defects of development in the lower extremities also. The varieties of club-foot--talipes varus, valgus, equinus, equino-varus, etc.--are so well known that they will be passed with mention only of a few persons who have been noted for their activity despite their deformity. Tyrtee, Parini, Byron, and Scott are among the poets who were club-footed; some writers say that Shakespeare suffered in a slight degree from this deformity. Agesilas, Genserie, Robert II, Duke of Normandy, Henry II, Emperor of the West, Otto II, Duke of Brunswick, Charles II, King of Naples, and Tamerlane were victims of deformed feet. Mlle. Valliere, the mistress of Louis XIV, was supposed to have both club-foot and hip-disease. Genu valgum and genu varum are ordinary deformities and quite common in all classes. Transpositions of the character of the vertebrae are sometimes seen. In man the lumbar vertebrae have sometimes assumed the character of the sacral vertebrae, the sacral vertebrae presenting the aspect of lumbar vertebrae, etc. It is quite common to see the first lumbar vertebra presenting certain characteristics of the dorsal.