The islands of western Lake Erie are rock-bound isles that abound in rocky outcrops and quarries. The rocks of these islands are of two distinct types, Silurian dolomites and Devonian limestones. The dolomites, exposed in the Bass Islands and Sister Islands are virtually devoid of fossils. Conversely, the limestones of Johnson Island, Marblehead, Kelley's Island, and Pelee Island abound in Paleozoic fossils. The purpose of this report is to document the fossil fauna that has been reported for these islands and to compile a taxonomic list of the families and species of invertebrate fossils found in the island region of Lake Erie. This document includes published accounts and the results of personal investigations. A final section of the report contains 131 descriptions and illustrations of the important fossil taxa found in the rocks. (Author/CW)