The Santa Cruz Island Scrub Jay, Aphelocoma coerulescens insularis. is a genetically isolated population limited in its geographic distribution to Santa Cruz Island, Santa Barbara County, California. This insular form is characterized by rather pron . . .

The island night lizard, Xantusia riversiana Cope (Fig. 1), is found only on Santa Barbara, San Clemente, and San Nicolas Islands off southern California (Fig. 2). The species is sufficiently divergent in morphology from its mainland relatives, X. vig . . .