Abstract
ABSTRACT The auditory organ of the Decapod Crustaceans is usually situated in the basal portion of the inner antenna, for it has been satisfactorily shown that the organ at one time termed an “auditory cylinder,” and enclosed in the basal joint of the outer antenna, has nothing to do with the function of audition. The true auditory organ was discovered by Rosenthal, in 1811, and in 1843 it formed the subject of careful studies by M. Favre. It has since been studied by several observers, and in particular by M. Kröyer †but the details of its structure have nevertheless, in great part, remained a subject of dispute. The excellent researches of M. Hensen, which have extended to twenty-eight species of Crustacea, are therefore a welcome contribution on the subject.
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