. The Canadian field-naturalist. September, 1932] The Canadian Field-Naturalist 137 /n\ la X2 lb 2 1c X2 Id X2 2a ^^X2 2bx2 Ic-'^^^xZ 2d. Plate No. 2 and a subgenus. The separation has been based from Ottawa is made the type species of the genus both on internal and external features. Of the Doleroidcs. two Black River genera, Pionodema, restricted, is There are tw o forms at Westport and through- described externally as punctate and Doleroides out the Ottawa valley. The more common form as impunctate. Billings' species Orthis gibbosa has, heretofore, always been identified as Piono-. Please n

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. The Canadian field-naturalist. September, 1932] The Canadian Field-Naturalist 137 /n\ la X2 lb 2 1c X2 Id X2 2a ^^X2 2bx2 Ic-'^^^xZ 2d. Plate No. 2 and a subgenus. The separation has been based from Ottawa is made the type species of the genus both on internal and external features. Of the Doleroidcs. two Black River genera, Pionodema, restricted, is There are tw o forms at Westport and through- described externally as punctate and Doleroides out the Ottawa valley. The more common form as impunctate. Billings' species Orthis gibbosa has, heretofore, always been identified as Piono-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club

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