220 



the calcaneus has been injured so that it cannot be accurately measured, 

 but the vertical length of this facet is at least 13 mm, the greatest 

 breadth at the dorsum 8 ram. Finally, the facet on the secondary 

 cuboid, articulating with the head of the talus, faces obliquely inward 

 and upward. It is nearly round, the greatest diameter being 8 mm, 

 and is separated by a sharp ridge (Fig. 2) from the facet for the calca- 

 neus. The correspondence of the bone here described with the dia- 

 gram composed by Pfitzner (Fig. 475, Rauber's Lehrbuch) is very 

 remarkable. 



The plantar surface of the cuboid on the other (right) foot pre- 

 sents an uncommonly large posterior process projecting into the sole 

 and extending distally below the lateral part of the plantar surface of 

 the navicular, with the proximal part of which it arculates, the facet 

 being on the dorsal and median aspect of the projection. The proximal 

 aspect of the process is non-articular (Fig. 2). It resembles tolerably 

 closely the drawing of a secondary cuboid fused with the cuboid in 

 Fig. 27 of Pfitzner's work (6). It is very noteworthy that no one 

 could tell by looking at the plantar aspect of this foot, or at the 

 corresponding drawing of Pfitzner's, whether this element articulates 

 with the talus or not. In his specimen it does, in mine it does not. 

 Fig. 2 of this paper shows unmistakably the identity of this process 

 of the right cuboid with the free cuboides secundarium of the left foot. 



According to Pfitzner, but four cases are mentioned in which 

 this element was found on the cuboid — those of Sutton (7), Thane, 

 and Macalister, the last having seen it twice. Gruber (3) and 

 Morestin (5) also had described cases in which this element was fused 

 with the navicular without, however, recognizing their significance. 

 Pfitzner was the first to recognize that these processes of cuboid 

 and navicular are one and the same thing. He found this element 

 marked on the cuboid 11 times in 425 feet bearing an articular facet 

 for the head of the talus, and in two others without the last feature. 

 I have shown in my Atlas of Variations (1), Fig. 57, a secondary 

 cuboid fused with the navicular, but with features which strongly 

 suggested that it had once been free. It was attached to the outer 

 end of the navicular at its plantar border at approximately a right 

 angle, so as to come directly under the head of the talus more per- 

 fectly than I have seen in any other specimen. I should say that the 

 dorsal aspect of the talus in this case was distinctly pathological. In 

 Fig. 58 of the Atlas, I have shown a specimen of secondary cuboid 

 in a foot of unknown origin, in which — though less clearly marked 



