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PLATE XVI. Representative oligotrichs (order Oligotrichida).
Fig. 1. Halteria, suborder Oligotrichina.
2. Strombidium, suborder Oligotrichina.
3. Eutintinnus, suborder Tintinnina.
4. Stenosemella (misidentified in past as Tintinnopsis), suborder Tintinnina.