454 THE SHOULDER-GIRDLE IN DASYURUS AND PERAMELES. 
EXPLANATION OF PLATE 41. 
Reference Letters.—a.b.c.sc., anterior border of cartilaginous scapula; ac., 
acromion; cl., clavicle; cm., cleithrum; co., coracoid; %.c/., interclavicle ; 
o.st., omosternum ; p.co., precoracoid ; p.st., presternum ; 7., rib; se., scapula ; 
sp., spine; sz., sternum; w.¢., undifferentiated tissue; <.s¢., xiphisternum. 
Fig. 1. Dasywrus viverrinus. Side view of shoulder-girdle of mammary fcetus 
(H.L. 4 mm.). Reconstructed from sections. x 50. 
2. The same. Front view of shoulder-girdle and sternum. Reconstructed 
from sections.  X 50. 
3. Trichosurus vulpecula. Side view of shoulder-girdle of mammary 
foetus (G.L. 17 mm.). Reconstructed from sections. x 14, 
4, Udenodon Baini. Side view of shoulder-girdle. Partly restored. 
(Coracoid and precoracoid considerably foreshortened.) Half natural 
size. 
5. Dasyurus viverrinus. Front view of shoulder-girdle of mammary 
foetus (H.L. 8 mm.). Reconstructed from sections. xX 20. 
6. Perameles obesula. Side view of shoulder-girdle of mammary foetus 
(H.L. 9 mm.). Reconstructed from sections. Xx 20. 
