PLATE 5 



EXPLANATION OF FIGURES 



11 Ventral portion of shoulder-girdle of the shark, Notidanus indicus, show- 

 ing the presternum hi the midline. After Parker. 



12 Ventral part of the shoulder-girdle of Polypterus. Note epicoracoid at 

 junction of the clavicles. From Gregory, after Goodrich. 



13 Clavicles and epicoracoid of the tropical fish, Gobius niger Linn., after 

 Parker. 



14 to 15 Upper and lower views of the girdle of the Dipnoid, lepidosiren. 

 After Parker. 



16 to 19 A series of stages in the development of the sternum of the frog, 

 Rana temporaria, indicating that the sternum is coracoidal in origin. After 

 Parker. 



CI, clavicle PtOmSt, post-omosternum 



Cr, coracoid OSt, omosternum 



ECr, epicoracoid Sc, scapula 



PrOmSt, pre-omosternum St, sternum 



100 



