Presumptive neurosecretion in Leucochloridiomorpha constantiae (Trematoda) and its possible role in governing maturation.

HIJ~~ K. R. and CHINO T. C. 1972. Presumptive neurosecretion in Leucochloridiomorpha constantiae (Trematoda) and its possible role in governing maturation. International Journal for Parasitology 2: 361-367. A review of literature dealing with neurosecretion in the Platyhelminthes is presented and presumptive neurosecretory cells associated with the cerebral ganglia and longitudinal nerve cords of Leucochloridiomorpha constant& metacercariae and adults are described. Both the mean number of aldehyde-fuchsin stained presumptive neurosecretory cells and the intensity of staining are less in adults than in metacerdae. This suggests that maturation in this trematode may be directly or indirectly associated with a reduction in neurosecretion as in nereid annelids. Results of cytochemical studies indicate the neurosecretory product contains a glycoprotein.