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Hexacontium hexactis (Stöhr, 1880)

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Cortical shell thick walled, smooth, or a little rough. Pores regular circular, of the same breadth as the bars; five to seven on the radius. Radial proportion of the three spheres= 1:3:6. Both medullary shells of the same structure, but with smaller pores. Six spines triangular pyramidal, nearly as long as the diameter of the outer shell, three times as broad at the base at the base as one pore.
Dimensions:
Diamtere of the outer sphere 0.1, middle 0.05, inner 0.16; cortical pores and bars 0.008; length of the spines 0.08, basal breadth 0.025.
Haeckel 1887


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