Trilobites typical of the well-known Olenellus zone of the Lower Cambrian constitute a large collection from the Eager Formation, near Cranbrook, B.C. Their classification is discussed and two new species described: Olenellus eagerensis n.sp. and Olenellus schofieldi n.sp.

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Since the use of certain structures in classifying olenellids has been disputed in the past, these and other less controversial features are critically examined, insofar as they apply to the genera and species present.

From this study the writer assembles criteria which might be used by later workers to re-define the generic and specific positions of selected species of Olenellus and Paedeumias.

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