Abstract
Histrological changes occuring in the third abdominal ganglion during the metamorphosis of the ventral nerve cord of Pieris brassicae have been described in detail. Although these changes are extensive but third, fourth and fifth abdominal ganglion remain generally unchanged and resemble each other closely. These ganglia represent the typical structure as they retain their separate identity and arepassed as such from the larva to the adult. The detailed structure of the third ganglion only has been described here while that of the fourth and fifth ganglia has been compared to it. The consistant features of this ganlion throughout the various postembryonic developmental changes include, two pairs of peripheral nerves to supply the segmental muscles of the body wall; a central "Structured Stratified type" of neuropile containing a number of glomerular regions and varying number of paired nerve tracts, and the cortex which consists of neurones and four types of glial cells.
FIRDAUSIA AZAM ALI. (1991) HISTOLOGICAL CHANGES OCCURING IN SOME OF THE GANGLIA DURING METAMORPHOSIS OF THE VENTRAL NERVE CORD OF PIERIS BRASSICAE (LINN.) (PIERIDAE LEPIDOPTERA) , Punjab University Journal of Zoology, Volume 6, Issue 1.
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