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PLATE II (p042)

Nonciliary features of ciliate oral areas, and modes of stomatogenesis.

1. Apical cytostome
of prostome
gymnostomes
(e.g., Holophrya).
2. Cytostome
at base of vestibulum
(Coelosomides).
3. Cytostome
at base of vestibulum
(Colpoda).
4. Ventralization
of oral area
(hypostomes),
with atrium possible (Furgasonia).

5. Advent of buccal cavity
(hymenostomes),
sometimes with prebuccal "oral groove" (Tetrahymena).
6. Advent of buccal cavity
(hymenostomes),
sometimes with prebuccal "oral groove" (Paramecium).
7. Specialized infundibulum (peritrichs, e.g., Vorticella).
8. Prominent peristomial field (spirotrichs, e.g., Euplotes).

Major modes of stomatogenesis.


9. Telokinetal (Alloiozona).
10. Telokinetal (Colpoda).
11. Parakinetal (Tetrahymena).
12. Parakinetal (Condylostoma).

13. Buccokinetal (Pseudocohnilembus).
14. Buccokinetal (Urocentrum).
15. Apokinetal (Entodinium).
16. Apokinetal (Strombidium).