466 
Third foot, os paracuneiforme, calcaneus secundarius, the 
latter} being free in a case of calcaneo- scaphoid coalescence. 
Professor PFITZNER has assured me that the bone which I have 
since named intercuneiform is absolutely new; for having had previous 
tokens of his kindness I ventured to ask him the question. The bone 
that I have called paracuneiform, I believe to be new, but am less 
certain that it is not of pathological origin. The occurrence of a per- 
fectly free calcaneus secundarius in the case of a coalescence of the 
os calcis and scaphoid is to the best of my knowledge as yet undescribed. 
Os intercuneiforme. 
Case 1 (Fig. 1) [Museum number 9390a—6]. The first and 
best specimen of this new bone came from the right foot of a white 
man, aged fifty three years. There are some slight signs of periosti- 
tis on the dorsum of the scaphoid, and perhaps, on the calcaneus above 
the _articular surface for the cuboid, but otherwise the condition of 
the bones is normal. The intercuneiform is wedge-shaped, situated 
on the dorsum in the little fossa which exists between the proximal 
ends of the first and second cuneiforms. The proximal end of the 
bone is rounded, the distal end pointed. The length is 11,5 mm. 
The greatest breadth is 4,5 mm, and the greatest depth 4 mm, both 
the latter dimensions being near the proximal end. 
The little fossa in which the bone lies is practically constant. 
Though it has never been described it has been repeatedly indicated 
in illustrations. A particularly good view is given by SPALTEHOLZ 
(Atlas, Fig. 200). This little pit is seen only when the bones are in 
position. It is then very easy to see a marked difference on the 
dorsum in the relations of the second cuneiform with its neighbors. 
The plane of the dorsal surface usually passes without interruption 
over the joint between it and the third cuneiform. On the contrary 
there is a little hollow between the proximal ends of the first and 
second cuneiforms. Both bones have a share in forming this hollow, 
but as a rule the share of the second is the greater. When the bones 
are in place the line of the joint between them shows a change of 
direction a little in front of the middle, the distal part of the line 
being more oblique. The fossa extends nearly or quite to the point 
of change of direction. It is practically always present, and usually 
very evident, but occasionally is not distinct. 
In the foot under consideration the fossa is well-marked, but I 
should hesitate to say that it is exceptionally so. The dorsal sur- 
face of the intercuneiform is rough like that of the normal tarsals, 
and is continuous with the proximal surface into which it gradually 
