LEMUBS. 403 



from B6duer, Prance, has been identified. The animals here re- 

 ferred to appear to have their nearest analogues among the African 

 lories or galagos. From certain peculiarities in the structure of 

 the cranium, which are supposed to represent similar structures 

 seen in the Ungulata, Filliol recognises in these animals an extinct 

 zoological type, designated the Pachylemur, -which stands inter- , 

 mediate between the true lemurs and the pachyderms. Necrolemur 

 antiquus and N". Edwardsi, on the other hand, from the phospho- 

 rites of Quercy, are considered to be true lemurs. Lemuroid forms 

 do not appear to be represented in any of the Tertiary formations 

 newer than the Lower Miocene or Oligocene. 



Numerous forms, referable to the same group of animals, have 

 been described from the Lower Tertiaries of the Western United 

 States (Lemuravus, Limnotherium, Microsyops, Hyopsodus, Mixo- 

 dectes, Anaptomorphus, &c. ). These in part indicate a transition 

 to the hoofed animals, while others, again, are so closely linked 

 with the Insectivora that they are barely, if at all, separable from 

 them. A reference to some of these forms will be found in the 

 section following the discussion of the Insectivora. As in Europe, 

 no lemuroid forms are known from either the American Miocene 

 or Pliocene formations. 



