of Fingers and Toes, and of the Phalanges, in Man. 93 
their children, twenty-four sons and twenty-seven daughters, were 
likewise all normal, except one of Mrs B——’s daughters, being 
the case under description. 
The occurrence of it in the maternal grand-uncle, indicates the 
variety to have existed in some generation previous to his. The 
case shows it to have passed over at least two generations, the 
grandmother and the mother, and to have reappeared in the third 
generation in the case of the girl B——. 
For this and the five following cases 17, 17 (a), 18, 18 (a), 
19, 19 (a), I am indebted to Dr Gibson of Campbeltown, 
who has most kindly taken much interest and trouble in 
obtaining and sending me the information. 
17. Case of Additional Digit on one Hand, with Three Phalanges and 
a Metacarpal Bone ; and Additional Digit on each Foot. Dvrect 
Hereditary Origin. 
W S , et. 73, Argyleshire, has, on his left hand, asixth 
finger, placed midway between the thumb and fore-finger. It has 
three phalanges and a metacarpal bone, all clearly felt. It hangs 
pendulous, not having the power of extension. Its length is 34 
inches, that of the thumb being 24, that of the fore-finger 4 inches. 
The thumb and fore-finger are each 3 inches in circumference, the 
intermediate digit 23. 
He states that he has six toes on each foot, and that the addi- 
tional toe is placed and formed in the very same way as in the 
hand. His children, four in number, are without digital variety, 
but it is hereditary, as fully given with the next case, that of a 
sister. 
17 (a). Case of Two Thumbs, one of them with Three Phalanges on 
each Hand ; and Two Great Toes on each Foot, with an Additional 
Metatarsal Bone on one Foot. Direct Hereditary Origin. 
A S , Argyleshire, has six digits on each hand and on 
each foot. The additional digit is on the inner side. One of the 
thumbs presents three phalanges, on each hand, and one of the 
additional great toes has a separate metatarsal bone. 
The two thumbs are supported on one unbifurcated metacarpal 
bone. The thumb next the fore-finger is clearly felt to have three 
phalanges, while the lesser thumb has two phalanges. It is the 
same on both hands. The greater thumb is 23 inches in length on 
the left hand, and 23 on the right; the lesser ‘thumb i is 2 inches in 
length on both hands. The circumference of the greater thumbs 
on the left and right sides, respectively, is 24 and 24, that of the 
lesser thumbs being 2 inches. The two thumbs are webbed at 
their base. In each hand, it is the thumb next the fore-finger 
which is used. 
