Figures 19–26 in Redescription of Pseudovorticella cylindrica (Dons, 1915) nov. comb. and Zoothamnium hiketes Precht, 1935, two poorly defined marine peritrichs (Ciliophora: Peritrichia) from the north China Sea

Figures 19–26. Morphology of Zoothamnium hiketes from life (19–23), after protargol (24, 25) and silver nitrate impregnation (26). (19) General view of a typical zooid. (20) Showing varieties of body shape and macronucleus. (21) Detail of stalk, arrowheads show many rod-shaped bacteria on stalk surface. (22) Zoothamnium hiketes (from Precht 1935). (23) Colony form. (24) Detail of the three oral peniculi, arrows mark separated upper end of the outer two rows in P2. (25) Oral infraciliature, arrow notes epistomial membrane, double arrowhead indicates the oral distal fragment. (26) Silverline system. ACW, aboral ciliary wreath; G, germinal kinety; H, haplokinety; P1–3, peniculi 1–3; Po, polykinety. Bars: 30 mm (19); 20 mm (21, 22a); 100 mm (22b); 150 mm (23).