XI. 



GET EOS A UR US RIBS. 



267 



are about one-fourth longer. In Professor Owen's account of Ceteo- 

 saurus brevis of the Wealden, he gives to that species the fossils 

 above noticed by Mantell as pelorosaurus. 



Ribs belonging to some ten or a dozen vertebrae were found, 

 but none complete. Indications were obtained of a length of five 

 feet, and an interval of the articulating heads of one foot. 



Diagram XCVIL Eibs of Ceteosaurus. Scale one-tenth of nature. 

 I. Anterior. 2. Middle dorsal. 



Shoulder girdle and fore-leg.' For a considerable time in the 

 course of the digging there seemed reason to fear that no parts 

 of the animal but those behind the back would be brought to light 

 In the progress of the excavations, however, the interesting bones 

 now to be mentioned, viz. sternum, coracoids, scapula, and humerus, 



