PLATE 7 



EXPLANATION OP FIGURES 



25 An old specimen of Anguis fragilis. Very similar to amphibian girdle. 

 No ribs attached. Same intimate relation of sternum and coracoidal part as 

 in the Amphibia. Modified after Parker. 



26 In Stellio cordylinus long sternal bars make their appearance. No ribs 

 are attached to them. Adapted from Parker. 



27 Laemanctus longipes. After Parker. 



28 Trachydosaurus rigosus adult. Sternal bars are fused and ribs are 

 approaching. Adapted from Parker. 



ECr, epicoracoid R 1 , first rib 



Gl, glenoid Sc, scapula 



ICl, interclavicle St, sternum 



PCr, precoracoid Slf, sternal fossa 



PSl, presternum XSt, xiphisternum 



104 



