Neurosecretion in the central nervous system of an Indian spider Oxyopes sakuntale Tikader (Araneidae: Oxyopidae)

Neurosecretory cells have been observed in the entire central nervous system of an adult Indian spider Oxyopes sakuntale Tikader. These cells are present in groups at various locations in the central nervous system. They can be divided into two types on the basis of their shape, size and cytomorphic properties. Unlike insects here the median group of pars intercerebralis has very few cells. All the neruosecretory cells have similar staining reaction and can not be differentiated into types on the basis of their staining property. Majority of the cells are circular in shape, bigger in size and dark staining. In between there are few cells which are elleptical in shape, smaller in size and light staining. They all stain green with PAF (As modified by Ewen 1962) light blue with CHP (Gomori 1941) and red with HEIDENHAINS Azan stain.