Bernier explicitly rejects a categorization based on skin color, arguing that the dark skin of Indians is due to exposure to the Sun only, and that the yellowish colour of some Asians, while a genuine feature, is not sufficient to establish a separate category. Instead his first category comprises most of Europe, the Near East and North Africa, including populations in the Nile Valley and the Indian peninsula he describes as being of a near "black" skin tone due to the effect of the sun. His second category includes most of Sub-Saharan Africa, again not exclusively based on skin colour but on physiological features such as the shape of nose and lips. His third category includes Southeast Asia, China and Japan as well as part of Tatarstan (Central Asia and eastern Muscovy). Members of this category are described as white, the categorization being based on facial features rather than skin colour. His fourth category are the Lapps ("Lappons"), described as a savage race with faces reminiscent of bears (but for which the author admits to rely on hearsay). Finally, the natives of the Americas are considered as a fifth category, described as of "olive" ("olivastre") skin tone.