The following pages contain an enumeration of the lizards collected in Borneo by the Dutch Borneo-Expedition, of which expedition Mr. J. Büttikofer was the zoologist, and also of the lizards collected by Dr. A. W. Nieuwenhuis during his travels in the interior of this island. The collections made during these expeditions were very graciously presented to the Leyden Museum of Natural History and form a valuable addition to our collections; so among the 37 species of lizards there are no less than 7 new species and moreover 8 species were hitherto not represented in our Museum. These last named 8 species are indicated in our list with an asterisk. 1. Gymnodactylus consobrinus Ptrs.