The British naturalist James Cowles Prichard originally followed Blumenbach by treating Papuans and Native Australians as being descendants of the same stock as Austronesians. But by his third edition of "Researches into the Physical History of Man" (1836-1847), his work had become more racialized due to the influence of polygenism. He classified the peoples of Austronesia into two groups: the "Malayo-Polynesians" (roughly equivalent to the Austronesian peoples) and the "Kelænonesians" (roughly equivalent to the Australo-Melanesians). He further subdivided the latter into the "Alfourous" (also "Haraforas" or "Alfoërs", the Native Australians), and the "Pelagian or Oceanic Negroes" (the Melanesians and western Polynesians). Despite this, he acknowledges that "Malayo-Polynesians" and "Pelagian Negroes" had "remarkable characters in common", particularly in terms of language and craniometry.