Elementary textbook of economic zoology Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] CRAYFISH, LOBSTERS, CRABS, SHRIMPS, ETC. 109 antennule opening of green gland maxillipeds— thorax genital aperture .-'an us ---'uropod -telson FIG. 41.—Ventral aspect of female crayfish, Cambanis sp., with the appendages of one side removed.

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