My attention was directed by Doctor Meyer to certain interesting features on the fibula, calcaneus, and cuboid, and to the meager and imperfect descriptions of these surf aces and of the relations of the tendons of the mm. peronei to them in our standard text-books of descriptive anatomy.An investigation of these features was undertaken, a minimum of 150 bones being studied in each case. Most of the material was Caucasian from the later decades. Since many of the skeletons were composite, no study could be made of sex and age differences. 1) the posterior surface of the lateral malleolus; 2) the lateral or external surface of the calcaneus; and, 3 ) the plantar surface of the cuboid.The surfaces under consideration are : THE POSTERIOR ,SURFACE O F THE LATERAL MALLEOLUSThe posterior surface of the lateral malleolus is described The very briefly in text-books of anatomy and osteology. following excerpts will serve as illustrations :Thomson ( '23) : The posterior surface is wider and flatter than the anterior; the tendon of the peroneus brevis lies on it and often grooves it longitudinally, and the tendon of the peroneus longus lies on that of the brevis. . . . . hinter dem Apex geht an der hinteren Flache des llialleolus eine seichte Furche herab, der Sulcus malleoli lateralis, in welchem die Sehnen der Mm. peronaei longus und brevis verlaufen.Poirier and Charpy ( ' 11, I, p. 543) : lie bord postkrieur, tres Bpais, est creusk d'une large goutti& verticale que continue la gouttiere des pkroniers, dont nous avons vu l'origine sur la face externe de 1'0s.Spalteholz ('23) : . . . . on the posterior surface a shallow furrow for the tendons Practically no mention is made of the posterior surface of the lateral malleolus in works on anthropology, but Wright ('04-'Ot5) dealt with this region in a comparative study and Tracey ( '09) studied it in dissections, with special reference to the ligaments and to the mechanism of dislocation of the peroneal tendons.It should be noted that the posterior surface of the lateral malleolus is not confluent with the posterior surface of the corpus fibulae, but with its lateral surface. The lateral surface is directed slightly forward in the proximal third, faces laterally in its medial third (approximately), and becomes directed posteriorly in its distal third or fourth. This surface is bounded by the crista anterior and the crista lateralis. The former terminates as a distinct crest in the distal third of the bone, and from this point two ridges, more rounded than that from which they arise, diverge distally, enclosing a small triangular, subcutaneous surface. I have not found these ridges named in our texts, but they might be called the anterior and posterior crura of the crista anterior.The posterior surface of the lateral malleolus is thus bounded laterally by the posterior crus of the crista anterior (which separates it from the small triangular area), and medially by the crista lateralis. The fovea of the lateral malleolus lies medial to the distal extremity of the lateral ...

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