116 EDENTATA. 



M. 3611. Fragment of the dorsal region of the carapace ; probably 

 from the Pleistocene of Buenos Ayrcs, Argentine Republic. 

 This specimen agrees precisely in characters with the cara- 

 pace of the type specimen . The depression of the middle 

 of each central disk and the elevation of its rim is well 

 shown. No history. 



Fig. 21. 



Glyptodon clavipes ; from the Pleistocene of Buenos Ayres. The caudal sheath 

 probably belongs to Hoplophorus. Much reduced. A. View of entire 

 animal. B. Front end of carapace, c. Back view of same. D and B. 

 Upper and under side of cranium. F. Section of tail, showing caudal 

 vertebrae inside the bony sheath. 



M, 3612. Two scutes from the anterior portion of the carapace; from 

 Buenos Ayres. The central disks are of very large size. 

 Presented by B. Lydekker, Esq., 1886. 



M. 3613. A scute from the peripheral region of the carapace ; from 

 Buenos Ayres. The elevation of the central disk is well 

 shown. Presented by R. LydeMcer, Esq., 1886. 



39266. Fragment of the carapace ; from Buenos Ayres. 



Presented by Captain J. Parish, 1865. 



M. 3609. Cast of a portion of the peripheral region of the carapace. 



The original was obtained from Buenos Ayres, and is 



believed to be in the Museum of the Royal College of 



Surgeons. 



? Presented by the Council of the Royal College of Surgeons 



