Above, a flesh coloured fluke; middle, a long tailed imminset; below, a yellow loricaria. Coloured engraving by W. H. Lizars.

Licence: Public Domain Mark

Credit: Above, a flesh coloured fluke; middle, a long tailed imminset; below, a yellow loricaria. Coloured engraving by W. H. Lizars. Wellcome Collection. Source: Wellcome Collection.