In the spring of the year I was fortunate enough to get a fair number of Scutigera in the South of Europe. In making an examination, of their anatomy I found a sense organ which seemed to me to be of sufficient interest to render a more complete examination desirable. This organ is placed on the ventral surface of the head at a short distance behind the mouth and near the base of the mandibles. Its external appearance under a low power of the microscope (Zeiss’s objective A A) is shown in fig. 1.

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