The _Anthropoidea_, on the other hand, first appear in the Neotropical Region, in the upper Eocene, but the age of the Santa Cruz formation, in which the remains occur, has not yet been settled with certainty. In the Eastern Hemisphere they appear in the Mid-Miocene, and continue through the Pliocene, the Pleistocene and Recent deposits. As yet no remains have been found in the Nearctic Region, where Lemuroid remains occur so abundantly. {237}The subjoined tables indicate the number of species in each of the six great Zoo-Geographical Regions, followed by others showing those peculiar to, and those living and fossil in, the various sub-divisions of these Regions:-- _A._ _B._ _C._ _D._ _E._ _F._ Palæarctic Ethiopian Indian Australian Nearctic Neotropical Region. Region. Region. Region. Region. Region. LEMUROIDEA. CHIROMYIDÆ. Chiromys -- 1 -- -- -- -- TARSIIDÆ. Tarsius -- -- 2 1 -- -- Megaladapidæ.+ Megaladapis+ -- 1 -- -- -- -- LEMURIDÆ. Perodicticus -- 2 -- -- -- -- Loris -- -- 1 -- -- -- Nycticebus -- -- 1 -- -- -- Galago -- 6 -- -- -- -- Chirogale -- 3 -- -- -- -- Microcebus -- 5 -- -- -- -- Opolemur -- 2 -- -- -- -- Lemur -- 8 -- -- -- -- Mixocebus -- 1 -- -- -- -- Hapalemur -- 2 -- -- -- -- Lepidolemur -- 7 -- -- -- -- Gen. ined.+ -- 1 -- -- -- -- Avahis -- 1 -- -- -- -- Propithecus -- 4 -- -- -- -- Indris -- 1 -- -- -- -- Anaptomorphidæ.+ Microchærus+ 7 -- -- -- -- -- Mixodectes+ -- -- -- -- 2 -- Cynodontomys+ -- -- -- -- 1 -- Omomys+ -- -- -- -- 1 -- Anaptomorphus+ -- -- -- -- 3 -- Plesiadapis+ 4 -- -- -- -- -- Protoadapis+ 2 -- -- -- -- -- Adapidæ.+ Adapis+ 5 -- -- -- 1 -- Tomitherium+ -- -- -- -- 1 --