Two species of sea turtles and eight lizards comprise the herpetofauna of Kapingamarangi Atoll; the giant Micronesian gecko (Perochirus scutellatus) is unknown elsewhere. The mourning gecko (Lepidodactylus lugubris), oceanic gecko (Gehyra
oceanica), and azure-tailed copper-striped skink (Emoia impar) are the most common and widespread species, being recorded on 100%, 97%, and 87% of the 31 islands, respectively. The stump-toed gecko (Gehyra mutilata) and the Pacific blue-tailed skink
Williamson and Sabath (1982) have demonstrated a significant relationship between modern population size and environment by examining atoll area and rainfall in the Marshall Islands. The present work seeks to extend that argument into prehistory by examining the relationship of ancient habitation sites and size of aroid pit agricultural systems to atoll land area and rainfall regime along the 1,500-3,500 mm precipitation gradient in the Marshall Islands.