Sub-order 7. — Astrapotheria. 



Nesodon, another Tertiary genus, discovered in South Pier-case, 

 America, has been provisionally referred to this sub-order. An No * 20> 

 upper and a lower jaw of the smallest species (Nesodon ovinus, 

 Owen)*, from the S.W. Coast of Patagonia, are preserved in the 

 collection. They were brought home by Admiral Sir B. J. 

 Sidivan, K.C.B. 



Fig. 37.— Skull and lower jaw of Typotherium cristatum (Gervais). Jj nat. size 

 From the Pampas Formation, Pleistocene, Buenos Ayres, South America. 



A plaster cast of the skull, upper and lower jaws with teeth, Pier-case, 

 and some limb-bones of a larger species, Nesodon iwibricabus, have °' 

 recently been presented by Dr. F. P. Moreno, Director of the 

 La Plata Museum, and are exhibited in this case. Some speci- 

 mens of the skull and mandible of certain of the smaller and 

 more primitive Toxoclonts from Patagonia, pi^esented by the 

 same donor, are shown. 



Sub-order 7. — Astrapotheria. 



This sub-order like the last is entirely confined to South 

 America. 



The upper and lower jaws and some limb-bones of Homalo- 

 dontotherium are exhibited in this case, where also some fine 

 plaster-casts of skalls of Astrapotherium magnum and A. angus- 

 tidens are shown. 



* These specimens are figured by Sir Richard Owen in the " PhiJ. Trans." 

 Rot. Soc, 1853, Ms. 15 and 16. 



