Slide showing 'Chernes'. Slide shows line drawing of ventral view of 'Chernes sp.' Specific parts of arachnid are labelled. Label below drawing reads, 'Fig. 222. - Chernes sp., diagrammatic ventral view, x about 12. a. Anus; ch, chelicera; g, generative opening; p, pedipalp; 1,2,3,4, legs. (The stigmata are at the postera-lateral margins of the 1st and 2nd abdominal segments.) B, Taurus, with claws and sucking disc.' Late 19th - early 20th century