Abstract
ABSTRACT In the spring of last year, through the kind permission of the British Association for the Advancement of Science, I had the privilege of occupying the table which the Association supports at the Zoological Station in Naples. By the admirable arrangements made at this station I was able to have a constant and unlimited supply of living specimens of Amphioxus lanceolatus, and thought this a good opportunity to undertake some experiments with a view to ascertaining whether the curious patches of modified epithelial cells on the ventral wall of the atrium of Amphioxus had any excretory function, as Johannes Müller (1) had held probable; and whether also the atrio-cœlomic funnels first described by Professor Ray Lankester (2) in 1874, and again more recently (3), had any such function.
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