678 



MR. F. G. PARSONS ON THE 



[Kov. 20, 



are attached to it, close together, about its middle *. In all other 

 Porcupines the second rib is attached to the junction of the first 

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



Fig. 2. 



Lumbar Vertebrae, showing the position of tbe intercentra. 

 a a a. Intercentra. 



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

 centic 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 is 

 practically no connection between it and the acromion. 



1 In another specimen at the British Museum, the second cartilage was in its 

 normal position. 



