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5. On the Reproductive Organs in the Genus Eudrilus, E.P

Published online by Cambridge University Press:  15 September 2014

Frank E. Beddard
Frank E. Beddard
Affiliation:
Prosector to the Zoological Society of London
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Extract

Among the many interesting genera of earthworms described by M. Perrier, the most interesting and remarkable in many ways is Eudrilus. This genus is unique among earthworms, by reason of the peculiar structure of its generative organs. In all earthworms at present known, with this exception, the ovaries are situated in a distinct segment of their own, into which opens the funnel of the oviduct, which is quite independent of the ovary; the oviducts generally pass through the mesentery which bounds posteriorly the segment (usually the 13th) containing the ovaries, and open on to the exterior of the body in the ventral surface of the following segment.

Type
Proceedings 1885-86
Information
Proceedings of the Royal Society of Edinburgh , Volume 13 , 1886 , pp. 672 - 682
Copyright
Copyright © Royal Society of Edinburgh 1886

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References

note * page 672 Moniligaster appears to be somewhat abnormal in the size and position of the ovaries; but there is no fundamental difference from other Oligochæta.

note * page 673 Mr Layard, however, informs me that there is no direct communication between New Caledonia and South America.

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note ¶ page 678 Cœlomtheorie, p. 26 et passim.

note * page 679 It has been recently shown by Nussbaum (Zool. Anz., Bd. viii. p. 184) that the oviducts of the Leech are primitively independent of the ovary, and only later acquire a connection with it.

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note † page 681 Dos Ei und seine Befruchtung.