104 



Mr. Owen on the Glyptodon clavipes. 



The following are some of the admeasurements of the above-described Glyptodon from the River 

 Pedernal, and the admeasurements of the corresponding parts of the Megatherium : — 



Width of pelvis from the anierior spine of one ilium to that of the 

 other 



Total height of the vertebrae whose transverse processes separated the 

 iliac bones 



Ditto of a spinous process 



Breadth of a vertebra at the base of its spinous process 



Height of the medullary canal 



Width of ditto 



Largest diameter of cotyloid cavity 



Least ditto of ditto 



Depth of ditto 



Glyptodon. Megatherium. 



Inches. 



22 



6 



3 

 3 



Lines. Inches. Lines, 



5 

 3 



61 



11 



8 

 3 

 4- 



8 



7 

 4 



The following are admeasurements of the bones of Sir Woodbine Parish's Glyptodon, and of the cor- 

 responding bones of the Megatherium : — 



Humerus, breadth of distal end 



Radius, length 



proximal circumference 



middle ditto 



distal ditto 



Tibia and fibula anchj'losed, distal circumference 



Os calcis, length 



Astragalus, length 



Largest unguial phalanx, fore-foot, length 



breadth 



depth 



5 



3 



17 





7 



6 



28 





6 





12 



3 



4 





11 



6 



7 



8 



19 





16 





30 





6 





18 





4 

 3 

 1 

 1 



2 



10 



8 



11 



11 



3 



6 





The description of the armour associated with the bones of the Pedernal Glyptodon proves it to cor- 

 respond in size and structure with that of the Glyptodon of Villanueva; and the dimensions of the pelvis, 

 which are one-third smaller than in the Megatherium, equally agree with those of the bones of the ex- 

 tremities of the Glyptodon at present in London. 



The same Report on the Museum of Monte Video likewise contains a notice of the discovery, in the 

 Banda Oriental, of pieces of armour, said to be identical with that found in the Pedernal. One of these 

 pieces, which was associated with the caudal vertebrae, is thus described : " The covering of a tail was 

 found in the Rio Seco, entire in its length, and composed of a single bony piece ; but we observe in it 

 portions similar to the plates of the before-mentioned shelly covering, but of more variable diameters. 



