Slide showing negative image of 'Protozoa'. Slide shows diagrammatic image of 'Protozoa' in negative. Title below image reads 'Fig 17 - Trichosphaerium sieboldii, life-cycle.' The Protozoa are individually labelled with corresponding explanation as follows: '1.multinucleate agamont (schizont) form with covering of small needle-like spicules, and with pseudopia emerging from socket processes of ectoplasm; 1a, division (plasmotomy) of same; 2, formation of several agametes in agamont; 3, liberation of agametes from agamont; 4, young gamont (sporont) developing from agamete; 5, multinucleate gamont with no skeletal spicules and no pseudopodial sockets; 5a, plasmotomy of gamont; 6, repeated nuclear divisions in gamont; 7, liberation of resulting flagellate gametes from gamont; 8-10 syngamy of two flagellate gametes to form zygote (11); 12 and 13, zygote forms by repeated nuclear division the adult agamont form (1); 2 and 3, agametogony; 6 and 7, gametogony. After Schaudinn.' Late 19th - early 20th century