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On the Renal Organs of the Asteridea

Published online by Cambridge University Press:  15 September 2014

A. B. Griffiths
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Extract

I have already shown that the secretion of the five large cardiac sacs of the stomach of Uraster rubens contains uric acid; and consequently these sacs are considered to be the necessary apparatus for eliminating the nitrogenous products of the waste of the tissues, “it is possible that the uric acid arrived into the starfish's stomach in the interior of small mussels, &c., whose excretory organs contain that body, and of which as food the starfish appears to be very fond: anyhow, such a source of the uric acid must be eliminated before Griffiths’ conclusion can be accepted; for obviously, if the presence of urates were demonstrated in the gastric contents of an individual who had recently supped off oysters, it would by no means follow that the stomach was the organ whereby the individual excreted his urates.” Certainly not; but Mr Durham has overlooked the fact that if the uric acid had been introduced along with the food, I should also have found urea in the contents of the starfish's stomach; but I conclusively proved that urea was absent.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 19 , July 1893 , pp. 200 - 202
Copyright
Copyright © Royal Society of Edinburgh 1893

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References

note * page 200 Proceedings of Royal Society of London, vol.44 (1888), p. 325.Google Scholar

note † page 200 Quarterly Journal of Microscopical Science, vol.33 (1891).Google Scholar

note ‡ page 200 See the Chemical News, vol.51, p. 241; Proceedings of Royal Society of Edinburgh, vol.14, p. 230; and the author's book, The Physiology of the Invertebrate:, (Reeve & Co., London).

note * page 201 This statement may be readily confirmed when the proper tests are skilfully applied. I say “skilfully applied “because certain nitrogenous and other compounds have been said to be present in the secretion of the renal organs of many Invertebrates, which are not present at all.

note † page 201 Biologisches Centralblatt, Bd. ix. (1889–90), pp. 33, 65, and 127.Google Scholar

note ‡ page 201 Studies from Morphol. Labor., Cambridge, vol.5 (1890). See also Vejdovsky's System der Oligochmten, v., pp. Ill, 112, and 127.Google Scholar

§ The author, in Proceedings of Royal Society of Edinburgh, vol.14, p. 346.