THE SKELETON IN AMPHIBIA. THE STERNUM. 183 



A 



FIG. 30. SHOULDER-GIRDLE AND STERNUM OF 



A. An old male common Frog (Eana temporaria). 



B. An adult female Docidophryne gigantea (after PARKER). 



In both A and B the left suprascapula is removed. The parts left 

 unshaded are ossified ; those marked with small dots consist of hyaline 

 cartilage, those marked with large dots of calcified cartilage. 



1. calcified cartilage of supra- 7. clavicle. 



scapula. 8. glenoid cavity. 



2. ossified portion of supra- 9. coracoid foramen. 



scapula. 10. episternum. 



3. scapula. 11. omosternum. 



4. coracoid. 12. sternum. 



5. epicoracoid. 13. xiphisternum. 



6. precoracoid. 



