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Spongotrochus (?) venustum (Bailey, 1856)

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All rings of the disk concentric, circular, of equal breadth. Pores regular, circular, everywhere of nearly equal size, three on the breadth of each ring, a little smaller in the equatorial girdle, which is about as broad as the radius of the disk. Twenty to twenty-four bristle-shaped radial spines, irregularly disposed, proceed with their free points over the margin.
Dimensions:
Diameter of the disk (with four rings) 0.1, with the gridle 0.3; breadth of each ring 0.011; pores 0.002.
Haeckel 1887


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