THE NAUPLIAR STAGES OF BALANUS HESPERIUS PILSBRY

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Abstract
The details of morphology of the six naupliar stages of Balanus hesperius are described, the material being referable to the forma laevidomus of Pilsbry. The nauplii are particularly characterized by a long and somewhat slender body and rather stiff appendages, the rami of which are thickened proximally. The general pattern of development conforms to that of other nauplii and is remarkably similar in all balanids. Tables of sizes and setation are given.