Abstract
The slug, Limax flavus, excretes both urea and purines. 1 Urea and purines account for up to 59 and 41% of the excretory nitrogen, respectively. 2 Of the purines excreted uric acid predominates (64%) with quanine (22%) and xanthine (14%) usually being voided in lesser amounts. Neither adenine or hypoxanthine was detected. 3 Urea was excreted in urine while the purines were deposited irregularly, as semi‐solid, yellowish nubs.

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