Dactylose

Distinguished by its elongated dactylose form, and by the bold longitudinally striped pattern of the epidermis.

Source: wiktionary

It consists of a little calcareous cylindrical column, about one tenth of an inch in height, attached by a dactylose base, and surmounted by an expansion in the form of a reversed cone, the margin of whose wide end is extended into several radiating arms, which, like the rest of the fossil, are entirely calcareous.

Source: wiktionary

In front of them on the ventral surface is a pair of short dactylose processes, bluntly rounded at their tips; the abdomen is lacking.

Source: wiktionary