. The Canadian field-naturalist. July-August, 1947] The Canadian Field-Naturalist 139. Plate 3. Top: PORTUNUS SANGUINILENTUS (Herbst). Middle : METAPOGRAPSUS MESSOR (Fors- kal). Bottom; GRAPSUS GRAPSUS TENUICRUSTATUS (Herbst). Scale: The animals are photo- graphed on a bockground of 2 cm. 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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