Plate P4. Scanning electron microscope pictures. 1, 5. Igorina tadjikistanensis; (1a–c) Sample 198-1209A-23H-3, 127–128 cm; (5a–c) Sample 198-1209A-23H-3, 138–139 cm. 2, 8. Igorina albeari "chubby;" (2a–c) Sample 198-1209A-23H-3, 118–119 cm; (8a–c) Sample 198-1209A-23H-3, 130–131 cm. 3, 10. Igorina albeari; (3a–c) Sample 198-1209A-23H-3, 107–108 cm; (10a–c) Sample 198-1209A-23H-3, 114–115 cm. 4, 9. Igorina pusilla "high trochospire;" (4a–c) Sample 198-1209A-23H-3, 127–128 cm; (9a–c) Sample 198-1209A-23H-3, 124–125 cm. 6, 7. Igorina pusilla (Sample 198-1209A-23H-3, 127–128 cm).