. Bulletin of the Natural Histort Museum. Geology series. . Fig. 1 Left clavicle, ()53, natural size. lA, superior; IB, inferior. Fig. 2 Right proximal clavicle, , natural size. 2A, superior; 2B, inferior. Cutmarks are evident on the medial inferior surface (around the costoclavicular ligament attachment area), near midshaft, and on the anterosuperior margin of the acromial facet (see Andrews & Femandez-Jalvo, this series of papers). Along the superior surface, there is very mild rugosity at the insertion area for M. Sternocleidomastoideus. There is a weak but clear crest delimi
. Bulletin of the Natural Histort Museum. Geology series. . Fig. 1 Left clavicle, ()53, natural size. lA, superior; IB, inferior. Fig. 2 Right proximal clavicle, , natural size. 2A, superior; 2B, inferior. Cutmarks are evident on the medial inferior surface (around the costoclavicular ligament attachment area), near midshaft, and on the anterosuperior margin of the acromial facet (see Andrews & Femandez-Jalvo, this series of papers). Along the superior surface, there is very mild rugosity at the insertion area for M. Sternocleidomastoideus. There is a weak but clear crest delimiting the superior edge of the M. pectoralis major origin on the superoventral margin of the medial third of the shaft. Just lateral of midshaft this crest blends with the origination scar for M. deltoideus. Medially the M. deltoideus scar is rugose and well defined, laterally the muscle origin is marked by a clear crest superiorly and a rugose tubercle laterally, but the bone surface over most of this part of the origin area is not especially rugose. The insertion area for M. trapezius is marked by some smooth tubercles medially (just medial of the level of the conoid tubercle) and some rugosity just mediodorsal of the acromial articular surface. The superior surface of the acromial end is relatively smooth. On the inferior surface, the origin of M sternohyoid can be seen as a small patch of very slight rugosity. The costoclavicular ligament attachment is marked by a pit with small exostotic projections lining the dorsal edge of the ligament scar. The oval costoclavicular liga- ment scar is continued laterally as a rugose broad ridge extending roughly 29mm along the inferior shaft. This ridge may mark the inferior edge of M pectoralis major, perhaps including some of the attachment area of M. subclaviiis and the clavipectoral fascia near midshaft. The conoid tubercle is well defined and large, and projects. Please note that these images are extracted from scanned page images th
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