Archive image from page 266 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9885 Year: 1890 ( MUSCLES AND VISCERA OF THE IMAGO. 229 The thoracic ganglion appears to represent functionally the medulla oblongata and spinal cord of vertebrates. Its destruc- tion causes instant death, whilst a fly from which the head has been removed behaves v
Archive image from page 266 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9885 Year: 1890 ( MUSCLES AND VISCERA OF THE IMAGO. 229 The thoracic ganglion appears to represent functionally the medulla oblongata and spinal cord of vertebrates. Its destruc- tion causes instant death, whilst a fly from which the head has been removed behaves very much as a vertebrate does after the removal of the cerebral hemispheres. It is worthy of remark that the great nerves to the halteres, which also supply the chordotonal organs of the thorax, are connected with the thoracic nerve-centre, just as the auditory nerves of vertebrates are with the medulla oblongata. The organs of the special senses and the complex sexual apparatus cannot be considered in this part of my work, as it will be necessary to give full details of their structure and development to justify the views I hold, and a brief account of these parts would be practically without value. THE I' liLOW-lXY {CalUpliora Etytlirocepliala).
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