Plate I
Fig. 1: Paramecium bursaria, ventral view. Fig. 2: Paramecium caudatum, left lateral view. Fig. 3: Colpidium colpoda, right lateral view. Fig. 4: Paramecium trichium, dorsal view. Fig. 5: Vorticella microstoma, left lateral view; A, fully extended specimen; B, encysted specimen. Fig. 6: Vorticella nebulifera var. similis; A, extended specimen, left lateral view; B, view from above. Fig. 7: Coleps elongatus, dorsal view. Fig. 8: Pyxidium cothurnoides, lateral view. Fig. 9: Cyclidium glaucoma. Fig. 10: Vorticella microstoma, telotroch formation.
Abbreviations: C, contractile stalk; CA, caudal teeth; CS, cytostome; CV, contractile vacuole; CY, cytopharynx; FD, frontal disc; FV, food vacuole; MN, micronucleus; N, nucleus (usually macronucleus); OT, oral teeth; P, peristome; PD, peristomial disc; PL, plates; TR, trichocyst; UM, undulating membrane; V, vestibule; Z, zoochlorellæ.