Slide showing 'Chelifer cyrneus' and 'Chiridium museorum'. Slide shows two small engravings of two different species of arachnids(?). Each image is shown from above and shows full extent of animal. On left, 'Fig. 225. - 'Chelifer cyrneus, enlarged. (After Simon)'. On right, 'Fig. 226. - 'Chiridium museorum, enlarged. (After SImon)'. Both images have unknown scales to illustrate size. Late 19th - early 20th century