PLATE XV. Representative heterotrichs and odontostomes (order Heterotrichida, with six suborders; order Odontostomatida last two figures).

Fig. l. Climacostomum, suborder Heterotrichina.

2. Condylostoma, suborder Heterotrichina.

3. Metopus, suborder Heterotrichina.

4. Brachonella, suborder Heterotrichina.

5. Nyctotheroides, suborder Clevelandellina.

6. Clevelandella, suborder Clevelandellina.

7. Caenomorpha, suborder Armophorina.

8. Ascobius (misidentified in past as Folliculina), suborder Coliphorina.

9. Plagiotoma, suborder Plagiotomina.

10. Licnophora, suborder Licnophorina.

11. Saprodinium. order Odontostomatida

12. Epalxella. order Odontostomatida