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Benson 1966


Plate 4

Figures:
1-3 Hexacontium entacanthum Jörgensen; 1, VS-R-81a, 1-3cm, Q43/0, 300x; 2, VS-R-71a, 1-3cm, E18/0, 300x; 3, secondary outer shell present, VS-R-151b, 1-3cm, Y37/3, 300x.

4-5 Hexacontium laevigatum Haeckel; 4, VS-R-60b, 3-5cm, S14/3, 300x; 5, VS-R-71a, 1-3cm, W31/2, 300x.

6-7 Hexacontium cf. heteracantha (Popofsky); 6, VS-R-27b, 1-3cm, U16/2, 300x; 7, focus on medullary shells, VS-R-71a, 1-3cm, T26/4, 300x.

8-10 Hexacontium. cf. hericliti (Haeckel); 8, VS-R-71a, 1-3cm, H6/0, 300x; 9, focus on outline of shell showing rudimentary secondary outer shell, VS-R-71a, 1-3cm, V20/0, 300x; 10, VS-R-71a, 1-3cm, H16/0, 300x.