[taken from the "transitional species" faq...]
Transitional fossils from early eutherian mammals to primates:
Early primates -- paromomyids, carpolestids, plesiadapids. Lemur-like
clawed primates with generalized nails.
_Notharctus_, an early Eocene lemur
_Parapithecus_, a small Old World monkey (Oligocene)
_Propliopithecus_, a small primate intermediate between _Parapithecus_
and the more recent O.W. monkeys. Has several ape-like characters.
_Aegyptopithecus_, an early ape.
_Limnopithecus_, a later ape showing similarities to the modern gibbons.
_Dryopithecus_, a later ape showing similarities to the non-gibbon apes.
_Ramapithecus_, a dryopithecine-like ape showing similarities to the
hominids but now thought to be an orang ancestor.
_Australopithecus_ spp., early hominids. Bipedal.
_Homo erectus_. Numerous fossils across the Old World.
_Homo sapiens sapiens_. This is us. (NB: "Cro-magnon man" belongs
here too. Cro-magnons were a specific population of modern humans.)
_Homo sapiens neanderthalensis_ (not on the direct line to _H. sapiens
sapiens_, but worth mentioning).