Slide showing engraving of 'A Trichina spiralis'. Slide shows black and white engraving of 'Trichina spiralis'. Label below image reads 'Fig 35 - sexually mature Trichina spiralis; male. After Leuckart'. Part of 'Parasites and their hosts' series. Sticker in upper right corner '22'. Upper left labelled 'Laurie, London'. Number '45' written on tape on top edge of slide. Late 19th - early 20th century