12 



S.E. CHURCHILL 



Fig. 4 Right scapula, M. 54056, natural size. 4A, ventral; 4B, dorsal. 



puberty and fuse by around age 20: Williams & Warwick. 1 980). On 

 the basis of size and morphology, this specimen is likely to have been 

 the antimere of M.54057 (see below). 



M.54057 (GC 87 266/89 012) (Figs 7, 8) 

 Left 



Two fragments (GC 87 266 and 89 1 2) that join to form a portion of 

 a left scapula, preserve the glenoid fossa, axillary border, body, and 

 spine (Fig. 7). The total superoinferior length of the fragment is ca. 

 80mm and the mediolateral width is roughly 95mm. The spine 

 continues medially to the vertebral border, but it is damaged along its 

 superior margin, and the junction of the spine and vertebral border is 

 not complete. The acromion is missing and the coracoid process is 

 broken off at the root. The axillary border is complete and most of the 

 body is present. Matrix adheres to parts of the body, spine and 

 inferior axillary border Scratches (perhaps cutmarks) are visible on 

 the body, around the root of the spine, and on the dorsal aspect of the 

 axillary border. 



In size and morphology this specimen looks to be the antimere of 

 M.54056. The glenoid fossa forms a broad piriform (Fig. 8), al- 

 though not quite as dramatically as in the right scapula M. 34056, and 

 in other aspects of the morphology of the glenoid fossa and the 

 supraglenoid tubercle, infraglenoid tubercle, axillary border and 

 muscle markings this specimen is virtually identical to that of 



M.54056 (with the single exception that there does not appear to be 

 a second tubercle for the long head of M. triceps brachii on the 

 inferoventral margin of the glenoid fossa). 



As with M.54056, this scapula clearly belonged to an adult. The 

 subcoracoid and inferior glenoid rim secondary centres of ossification 



Table 4 Scapular dimensions (mm). 



Measurement 



M.54056 M.54057 M.54058 



Morphological length (M-2) 

 Basal spinous length (M-8) 

 Mid-axillary border thickness" 

 Spino-glenoid angle (M-22) 

 Axillo-glenoid angle (M-17) 

 Axillo-spinal angle (M-16) 

 Glenoid maximum length (M-12) 

 Glenoid maximum breadth (M-13) 

 Glenoid articular length'' 

 Glenoid articular breadth'' 



- 



(92.8) 



- 



- 



(75.2) 



- 



:ii.7) 



- 



9.8 



88° 



105° 



(101°) 



48° 



55° 



38° 



56° 



50° 



63° 



31.3 



31.7 



33.7 



26.9 



25.4 



(23.2) 



28.0 



29.5 



30.8 



25.2 



24.3 



23.1 



Martin numbers (M-#: Martin, 1928) for measurements are provided where 



appropriate. 

 ' dorsoventral diameter of the mid-axillary border, including dorsal and ventral 



pillars as present. 

 " Glenoid fossa length and breadth taken across the internal margins of the glenoid 



labrum attachment. 



