------------------+-----------------------------------+---------+-------- | TERTIARY. | POST- | NOW +-----------+-----------+-----------+TERTIARY.| LIVING. | EOCENE. | MIOCENE. | PLIOCENE. | | +---+---+---+---+---+---+---+---+---+----+----+----+--- | L | M | U | L | M | U | L | M | U | P | R | G | S +---+---+---+---+---+---+---+---+---+----+----+----+--- LEMUROIDEA. | | | | | | | | | | | | | Chiromyidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- Tarsiidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- Megaladapidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- Lemuridæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- Anaptomorphidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- Adapidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- | | | | | | | | | | | | | ANTHROPOIDEA. | | | | | | | | | | | | | Hapalidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | 1 | 1 | 2 | 22 Cebidæ |-- |-- | 4 |-- |-- |-- |-- |-- |-- | 7 | -- | 10 | 65 Cercopithecidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- Simiidæ |-- |-- |-- |-- |-- |-- |-- |-- |-- | -- | -- | -- | -- Hominidæ |-- |-- |-- |-- |-- |-- |-- | ? |-- | 1 | 1 | 1 | 1 ------------------+---+---+---+---+---+---+---+---+---+----+----+----+--- {236}The above tables show that during the Eocene epoch of the Tertiary Period the _Lemuroidea_ were confined to the Palæarctic and Nearctic Regions; and, if the geological record were more perfect, we should probably find that they were distributed across the greater part of the Northern Hemisphere, which at that period was sub-tropical in climate. Outside these two regions no Lemuroid remains have been found after the close of the Eocene (with the exception of the solitary Lower Miocene genus _Laopithecus_) till the Recent Period, when the superficial deposits of Madagascar have yielded the sub-fossil _Megaladapis madagascariensis_ and a large undescribed species (probably of a new genus) of _Lemuridæ_, both of which may have been living in the historic period. At the present day Lemuroids are unknown in either the Palæarctic or Nearctic Regions, and, with the exception of four species, none are now found outside the Ethiopian Region.