119 



individual to which it belonged appears to have been aged, as the sutures 

 of the ossicles are nearly- obliterated by anchylosis. 



From the tertiary deposits near the Rio Matanza, about twenty miles 

 to the south of the city of Buenos Ayres. 



Presented by Sir Woodbine Parish, K.H. 



552. Several pieces of the carapace of apparently the same individual of the 



Glyptodon clavipes, and from the same locality. 



Presented by Sir Woodbine Parish, K.H. 



553. A model in plaster of the foregoing pieces of the carapace of the Glypto- 



don clavipes, in natural juxtaposition. They form together a portion 

 measuring three feet six inches across, but with only one of the margins 

 entire ; this includes seven of the modified ossicles which show the trans- 

 ition from the obtuse to the pointed form of the projecting portions. 



554. A portion of a carapace including four or five dermal ossicles of a smaller 



species of Glyptodon (Glypt. ornatus, Owen). 



The outer surface of the ossicles is relatively smoother and the central 

 disc smaller as compared with the peripheral discs, which are seven in 

 number in each ossicle, and give its exterior surface the figure of a rosette. 



From the tertiary deposits near the Rio Matanza, about twenty miles 

 to the south of the city of Buenos Ayres. 



Presented by Sir Woodbine Parish, K. H. 



555. Another portion of the carapace of. apparently the same smaller species 



of Glyptodon, showing the projecting angular ossicles of the margin. 



From the tertiary deposits near the Rio Matanza, about twenty miles 

 to the south of the city of Buenos Ayres. 



Presented by Sir Woodbine Parish, K. H. 



556. A portion of the carapace of a gigantic Armadillo, as large as the Glyp- 

 todon clavipes, but differing in the sculpturing of the external surface of 

 the component ossicles, in which the peripheral raised portions are of 

 equal size with the central one, making the whole exterior appear to be 

 impressed by channels, in form of a net-work : the species indicated by 

 this fragment may be termed Glyptodon reticulatus. 



