Reports

Ureotelism of Echidna and Platypus

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Science  22 Mar 1963:
Vol. 139, Issue 3560, pp. 1225
DOI: 10.1126/science.139.3560.1225

Abstract

Analyses of plasma and urine and the demonstration of arginase in the liver indicate that both the adult echidna (Tachyglossus aculeatus) and platypus (Ornithorhynchus) are ureotelic.