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Neurosecretion in the central nervous system of the hermit crab,Diogenes bicristimanus

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Proceedings / Indian Academy of Sciences

Abstract

1. A detailed morphological description of the neurosecretory cells in the hermit crab,Diogenes bicristimanus, is given. The eyestalks ofDiogenes contain secretory bodies namely the Z-organs. Each Z-organ is located at some distance from the basement membrane of the compound eye encircling the optic peduncle. The Z-organs show secretory activity which follows that of the moult cycle.

2. The optic ganglia and sinus gland are incorporated within the brain.

3. Three types of neurosecretory cells, designated as A, B and C, are encountered in the central nervous organs other than the eyestalks. They are distinguished by their sizes, the nature of the nuclei, vacuoles and the secretory products in the cytoplasm. All the three cell types occur in the supraoesophageal ganglia, thoracic ganglion and abdominal ganglia while the commissural ganglia possess only A and B cells.

4. The secretory products appear to be discharged through the axons. The direct discharge of secretions into the blood capillaries surrounding the cells is also noticed.

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Authors and Affiliations

  1. Zoology Department, Marathwada University, Aurangabad

    R. Nagabhushanam & R. Sarojini

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  1. R. Nagabhushanam
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  2. R. Sarojini
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Communicated by Prof. P. N. Ganapati,d.sc., f.n.i., f.a.sc.

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Nagabhushanam, R., Sarojini, R. Neurosecretion in the central nervous system of the hermit crab,Diogenes bicristimanus . Proc. Indian Acad. Sci. 69, 20–28 (1969). https://doi.org/10.1007/BF03051779

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  • DOI: https://doi.org/10.1007/BF03051779

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