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Takahashi 1991


Plate 56

Suborder: Phaeodaria
Family: Lirellidae

Figure, Species, Station depth (m), Type of Micrograph, Magnification

1. Lirella bullata (Stadum and Ling), Same specimen as Plate 55, figure 10. Detail of wavy crests and striae., E: 3755, SEM, x 6400.

2. Lirella melo (Cleve), Cross section of a part of peristome showing several layers of different porosity., PB: 1268, SEM, x 3000.

3. Lirella melo (Cleve), Cross section corresponding to figure 2, showing polygonal meshwork in central part and two other layers of different porocity. Specimen ashed at 500 for one hour., PB: 2869, TEM, x 8300.

4. Lirella melo (Cleve), Same specimen., PB: 2869, TEM, x 2000.

5. Lirella melo ? (Cleve), Extensively dissolved specimen; shell integrity diminished., PB: 3769, SEM, x 1600.

6. Lirella melo (Cleve), Cross section showing polygonal meshwork and the pores., PB: 1268, SEM, x 5,000.

7. Lirella melo (Cleve), Same specimens as figure 3; cross section showing polygonal meshwork and porous outer layers. Note that the polygons are made of tubes., P1: 978, TEM, x 7600.

8. Lirella melo (Cleve), Cross section showing irregular pores bounded by tubular structure which is different from figures 3, 7., P1: 4280, TEM, x 6100.

9. Lirella tortuosa Takahashi, n. sp., Paratype; right coiled., PB: 1268, SEM, x 500.

10. Lirella tortuosa Takahashi, n. sp., Paratype; left coiled., P1: 4280, SEM, x 450.

11. Lirella tortuosa Takahashi, n. sp., Paratype; right coiled., P1: 4280, SEM, x 470.