"A, Vorticella, a stalked ciliate Infusorian; I, contracted; 2, extended. f, food "vacuoles"; g, gullet; m, contractile fibre (muscular); n, nucleus; o, mouth, surrounded by ciliated disc; p.v., pulsating vacuole; s, stalk. B, a colonial type similar to Vorticella." -Galloway, 1915

Vorticella

"A, Vorticella, a stalked ciliate Infusorian; I, contracted; 2, extended. f, food "vacuoles"; g, gullet;…