Island biogeography & Lizard Species

A research scientist comes back from a study of a group of islands in the South Pacific. He says that his data show that in some cases, the smaller islands he investigated had higher numbers of lizard species on them than did the larger
islands. He suggests these data indicate that we should reexamine the whole theory of island biogeography.

a. What additional information would you like to have about the group of islands he studied?

b. Is there any way his data could be accounted for using the current theory of island biogeography? Explain your reasoning.