Summary
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1.
The occurrence ofPisione remota (Southern) in the tropical environment at Madras is recorded and the external characters of specimens from Madras compared with those from Irish waters.
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2.
The reproductive structures in the two sexes have been described in detail.
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3.
While distinct specific features are found in the detailed structure of the accessory reproductive processes, a strong resemblance to the condition inP. gopalai andP. complexa is observed.
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4.
The salient features of the four valid species of the genusPisione have been tabulated and based on this the generic characters have been revised.
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5.
The affinities of the family Pisionidæ have been considered in the light of our knowledge of the anatomy ofPisionidens indica, Pisione gopalai,P. complexa andP. remota, and probable relationship to the Phyllodocidæ, the Glyceridæ and the Nephthydidæ has been indicated.
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6.
A revised statement of the characters of the family Pisionidæ has been given, incorporating in it our knowledge of the internal morphology of the species included in the same.
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References
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Additional information
Communicated by Prof. R. Gopala Aiyar,f.a.sc.
Published with the kind permission of the Chief Research Officer,Central Inland Fisheries Research Station, Barrackpore.
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Alikunhi, K.H. On the reproductive organs ofPisione remota (Southern), together with a review of the family pisionidæ (Polychæta). Proc. Indian Acad. Sci. 33, 14–31 (1951). https://doi.org/10.1007/BF03049972
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DOI: https://doi.org/10.1007/BF03049972