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The Gonads, Larvae, and Budding of the Polystyelid Ascidians Stolonica and Distomus

Published online by Cambridge University Press:  11 May 2009

N. J. Berrill
N. J. Berrill
Affiliation:
From the Plymouth Laboratory and McGill University, Montreal
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Extract

Stolonica socialis (Hartmeyer) and Distomus variolosus Gaertner are two species of styelid ascidians with a capacity for budding and colony formation, found on both sides of the western end of the English Channel. Distomusoccurs immediately below the level of extreme low spring tides, commonly encrusting the sides of rocks and laminarian bases. Stolonica is more usually found by dredging in deeper water, on the upper sides of stones or gravel bottom. Their external appearance and general internal anatomy have been well described and beautifully illustrated in the monograph of Lacaze-Duthiers and Delage (1892), while the process of budding has been investigated by Selys-Longchamps (1917).

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 27 , Issue 3 , November 1948 , pp. 633 - 650
Copyright
Copyright © Marine Biological Association of the United Kingdom 1948

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References

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