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Descrição:

In the buccal cavity a row of paroral cilia (pak) is seen to separate the buccal cavity (bc) from the beginning of the cytopharynx (cp). The macronucleus (mac) and micronucleus (mic) are visible. spo, spongiome of CV; pek, membranelles of perioral ciliature; opk, oral cilia; mt, microtubules bordering the ventral wall of the BC. EM taken on 3/12/71 by R. Allen with Hitachi HU11A TEM. Neg. 3,800X. Bar = 2 microns. This image is available in Richard Allen's collection.