Slide showing photograph of 'The blood fluke (Bilharzia haematobia)'. Slide shows engraving of 'The blood fluke'. Label below image reads, 'Fig. 7. - The blood fluke (Bilharzia haematobia). The lower end of the female is withdrawn from the gynaecophoric canal of the male. After Kuchenmeister.' Small round sticker is upper right corner, '18'. Number '28' written on tape on top edge of slide. Late 19th - early 20th century