A Comparative Morphological Study of the Nervous System of the Orthoptera and Related Orders1

The following investigation of the nervous system of Orthopteroid insects was originally planned to include both gross anatomical dissections and a finer examination of the neurohistological elements of representative species of the principal families of the order. The original purpose of the study was that it should be an introduction to the correlation of neurological structure and behaviour in invertebrate animals, that is, to establish a neurological basis for behaviour. So far only the first part of the plan has been carried out and that only in skeleton form. Histological preparations have been made but these have been used only to aid and correct the findings from gross dissection.