678 



MR. F. G. PAESONS ON THE 



[Nov. 20, 



are attached to it, close together, about its middled In all other 

 Porcupines the second rib is attached to the junction o£ the first 

 and second sternebrae, as it is in most other mammals. 



rig. 2. 



Lumbar Vertebrse, showing the position of the intercentra. 

 a a a. Intercentra. 



The xiphisternum is long and naiTow and tipped with a cres- 

 centie piece of cartilage. 



There are fourteen ribs, of which eight are vertebro-sternal, two 

 vertebro-costal, and four vertebral. 



The clavicle is thin and curved and is cartilaginous at each end. 

 Internally a rod of cartilage half an inch long connects it with the 

 sternum, while externally there is a leaf-shaped cartilage which 

 overlaps the coracoid process. The clavicle is firmly attached to 

 the coracoid by the coraco-clavicular ligaments, but there 

 practically no connection between it and the acromion. 



is 



^ In another specimen at the British Museum, the second cartilage was in \i% 

 normal position, 



